microblaze/mm: put mm_cmdline_setup() in .init.text section

As reported by lkp, there is a section mismatch of mm_cmdline_setup() and
memblock. The reason is we don't specify the section of
mm_cmdline_setup() and gcc put it into .text.unlikely.

As mm_cmdline_setup() is only used in mmu_init(), which is in .init.text
section, put mm_cmdline_setup() into it too.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Wei Yang <[e-mail]>
Reported-by: kernel test robot <[e-mail]>
Closes: https://lore.kernel.org/oe-kbuild-all/[e-mail]/
Reviewed-by: Oscar Salvador <[e-mail]>
Cc: Masahiro Yamada <[e-mail]>
Cc: Michal Simek <[e-mail]>
Cc: Wei Yang <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

arch/microblaze/mm/init.c

···
 /*
  * Check for command-line options that affect what MMU_init will do.
  */
-static void mm_cmdline_setup(void)
+static void __init mm_cmdline_setup(void)
 {
 	unsigned long maxmem = 0;
 	char *p = cmd_line;