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Fix the following build errors:

arch/sparc/mm/srmmu.c: In function ‘smp_flush_page_for_dma’:
arch/sparc/mm/srmmu.c:1639:13: error: cast between incompatible function types from ‘void (*)(long unsigned int)’ to ‘void (*)(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)’ [-Werror=cast-function-type]
 1639 |         xc1((smpfunc_t) local_ops->page_for_dma, page);
      |             ^
arch/sparc/mm/srmmu.c: In function ‘smp_flush_cache_mm’:
arch/sparc/mm/srmmu.c:1662:29: error: cast between incompatible function types from ‘void (*)(struct mm_struct *)’ to ‘void (*)(long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int,  long unsigned int)’ [-Werror=cast-function-type]
 1662 |                         xc1((smpfunc_t) local_ops->cache_mm, (unsigned long) mm);
      |
[ ... ]

Compile-tested only.

Fixes: 552a23a0

 ("Makefile: Enable -Wcast-function-type")
Cc: stable@vger.kernel.org
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220830205854.1918026-1-bvanassche@acm.org