[PATCH][GCC] arm: Add Cortex-R52+ multilib

[Przemyslaw Wirkus via Gcc-patches]

Patch is adding multilib entries for `cortex-r52plus` CPU.

See: https://www.arm.com/products/silicon-ip-cpu/cortex-r/cortex-r52-plus

OK for master?

gcc/ChangeLog:

2021-09-16  Przemyslaw Wirkus  <przemyslaw.wir...@arm.com>

        * config/arm/t-rtems: Add "-mthumb -mcpu=cortex-r52plus
        -mfloat-abi=hard" multilib.

rb14858.patch
Description: rb14858.patch