sh4: parisc: asm/cmpxchg.h:60:24: error: implicit declaration of function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]

[Naresh Kamboju]

The parisc and sh defconfig builds failed due to following build warnings
and errors on Linux next-20240402.

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

parisc:
  build:
    * gcc-11-tinyconfig - Failed
    * gcc-11-allnoconfig - Failed
    * gcc-11-defconfig - Failed

sh:
  build:
    * gcc-11-defconfig - Failed
    * gcc-11-dreamcast_defconfig - Failed
    * gcc-11-tinyconfig - Failed
    * gcc-11-shx3_defconfig - Failed
    * gcc-11-allnoconfig - Failed

In file included from arch/sh/include/asm/atomic.h:19,
                 from include/linux/atomic.h:7,
                 from include/asm-generic/bitops/lock.h:5,
                 from arch/sh/include/asm/bitops.h:63,
                 from include/linux/bitops.h:70,
                 from include/linux/log2.h:12,
                 from kernel/bounds.c:13:
arch/sh/include/asm/cmpxchg.h: In function '__cmpxchg':
arch/sh/include/asm/cmpxchg.h:60:24: error: implicit declaration of
function 'cmpxchg_emu_u8' [-Werror=implicit-function-declaration]
   60 |                 return cmpxchg_emu_u8((volatile u8 *)ptr, old, new);
      |                        ^~~~~~~~~~~~~~
arch/sh/include/asm/cmpxchg.h:62:24: error: implicit declaration of
function 'cmpxchg_emu_u16' [-Werror=implicit-function-declaration]
   62 |                 return cmpxchg_emu_u16((volatile u16 *)ptr, old, new);
      |                        ^~~~~~~~~~~~~~~
cc1: some warnings being treated as errors

Steps to reproduce:
------
# tuxmake --runtime podman --target-arch sh --toolchain gcc-11
--kconfig defconfig

Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240402/testrun/23264271/suite/build/test/gcc-11-defconfig/details/
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240402/testrun/23264273/suite/build/test/gcc-11-defconfig/details/

--
Linaro LKFT
https://lkft.linaro.org