BL2: Add mcuboot patch to prevent build warning on FIH_PANIC

[etienne-lms]

Embedding mcubootutil fih_panic_loop() implementation in TF-M generates a build warning message like the below due to that function missing a noreturn attribute:

.../arm-none-eabi/include/assert.h: In function '__assert_func':
.../trusted-firmware-m/platform/ext/common/tfm_assert.c:22:1: warning: 'noreturn' function does return
   22 | }
      | ^

I've created P-R mcu-tools/mcuboot#2371 to address the issue. Until it is merged, I propose to apply the related patch in Zephyr TF-M repository.

[nashif]

why are you submitting raw patches instead of fixing the code directly?

[etienne-lms]

I'm fine closing this P-R if #144's commit "boot_hal: workaround compiler warning" is the preferred way.
(edited: ref fixed, s/14/144/)

[etienne-lms]

why are you submitting raw patches instead of fixing the code directly?

I took example on patches for other lib/ext/ libs: submitting a P-R to the mainline repo (mcu-tools/mcuboot#2371) and adding a patch file in Zephyr TF-M repo but I understand it's maybe not the preferred way to go.

[etienne-lms]

I'm closing this P-R since #144 has been merged.