warp7: defconfig: Fix CAAM on boot with tip-of-tree

Booting the following image with tip-of-tree we get a CAAM DECO error (and
subsequent crash due to a kernel bug in 4.1).

http://freescale.github.io/#download -> BoardsWaRPboard community - WaRP -
Wearable Reference PlatformFSL Community BSP 2.3fsl-image-multimediawayland

Image: fsl-image-multimedia-imx7s-warp-20180323-90.rootfs.sdcard

Error:
caam 30900000.caam: Entropy delay = 3200
caam 30900000.caam: failed to acquire DECO 0
<snip>
caam 30900000.caam: failed to acquire DECO 0
caam 30900000.caam: Entropy delay = 12400
caam 30900000.caam: failed to acquire DECO 0
caam 30900000.caam: failed to instantiate RNG
------------[ cut here ]------------
WARNING: CPU: 0 PID: 1 at
/home/jenkins/workspace/fsl-community-bsp-pyro_xwayland_2/build/tmp/work-shared/imx7s-warp/kernel-source/mm/vmalloc.c:1465
caam_remove+0x6)
Trying to vfree() nonexistent vm area (88047000)
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted
4.1.36-4.1-1.0.x-imx-warp7+ga543d1b #1
Hardware name: Freescale i.MX7 Dual (Device Tree)
[<80015d54>] (unwind_backtrace) from [<80012688>] (show_stack+0x10/0x14)
[<80012688>] (show_stack) from [<8076e810>] (dump_stack+0x78/0x8c)
[<8076e810>] (dump_stack) from [<800346a0>]
(warn_slowpath_common+0x80/0xb0)
[<800346a0>] (warn_slowpath_common) from [<80034700>]
(warn_slowpath_fmt+0x30/0x40)
[<80034700>] (warn_slowpath_fmt) from [<8054c278>] (caam_remove+0x6c/0x3f4)
[<8054c278>] (caam_remove) from [<8054ce74>] (caam_probe+0x874/0xfa8)
[<8054ce74>] (caam_probe) from [<80382a7c>] (platform_drv_probe+0x48/0xa4)
[<80382a7c>] (platform_drv_probe) from [<80381328>]
(driver_probe_device+0x174/0x2a8)
[<80381328>] (driver_probe_device) from [<8038152c>]
(__driver_attach+0x8c/0x90)
[<8038152c>] (__driver_attach) from [<8037f9d4>]
(bus_for_each_dev+0x68/0x9c)
[<8037f9d4>] (bus_for_each_dev) from [<80380a68>]
(bus_add_driver+0xf4/0x1e8)
[<80380a68>] (bus_add_driver) from [<80381b38>] (driver_register+0x78/0xf4)
[<80381b38>] (driver_register) from [<80009738>]
(do_one_initcall+0x8c/0x1d0)
[<80009738>] (do_one_initcall) from [<80a66dac>]
(kernel_init_freeable+0x140/0x1d0)
[<80a66dac>] (kernel_init_freeable) from [<8076aa38>]
(kernel_init+0x8/0xe8)
[<8076aa38>] (kernel_init) from [<8000f468>] (ret_from_fork+0x14/0x2c)
---[ end trace d5f941204ed8cb28 ]---
caam: probe of 30900000.caam failed with error -11
Unable to handle kernel NULL pointer dereference at virtual address
00000004
pgd = 80004000
[00000004] *pgd=00000000
Internal error: Oops: 805 [#1] PREEMPT SMP ARM
<snip>
[<8055cdf8>] (caam_sm_startup) from [<80aa83c8>] (caam_sm_init+0x50/0x58)
[<80aa83c8>] (caam_sm_init) from [<80009738>] (do_one_initcall+0x8c/0x1d0)
[<80009738>] (do_one_initcall) from [<80a66dac>]
(kernel_init_freeable+0x140/0x1d0)
[<80a66dac>] (kernel_init_freeable) from [<8076aa38>]
(kernel_init+0x8/0xe8)
[<8076aa38>] (kernel_init) from [<8000f468>] (ret_from_fork+0x14/0x2c)
Code: e59d300c e2832010 e5843008 e5834068 (e58a2004)
---[ end trace d5f941204ed8cb29 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Fix: Enable the CAAM correctly by setting CONFIG_ARMV7_BOOT_SEC_DEFAULT=y
in the upstream defconfig.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-by: Breno Lima <breno.lima@nxp.com>

configs/warp7_defconfig

@@ -3,6 +3,7 @@ CONFIG_ARCH_MX7=y
 CONFIG_SECURE_BOOT=y
 CONFIG_SYS_TEXT_BASE=0x87800000
 CONFIG_TARGET_WARP7=y
+CONFIG_ARMV7_BOOT_SEC_DEFAULT=y
 # CONFIG_ARMV7_VIRT is not set
 CONFIG_IMX_RDC=y
 CONFIG_IMX_BOOTAUX=y