MIPS: MT: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: linux-mips@linux-mips.org
Cc: trivial@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13323/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mips_mt.h

 /*
- * Definitions and decalrations for MIPS MT support that are common between
+ * Definitions and declarations for MIPS MT support that are common between
  * the VSMP, and AP/SP kernel models.
  */
 #ifndef __ASM_MIPS_MT_H