MIPS: R6: Fix typo

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Cc: macro@imgtec.com
Cc: paul.burton@imgtec.com
Cc: Leonid.Yegoshin@imgtec.com
Cc: trivial@kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13329/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/mips-r2-to-r6-emul.c

@@ -2202,7 +2202,7 @@ int mipsr2_decoder(struct pt_regs *regs, u32 inst, unsigned long *fcr31)
 	}
 
 	/*
-	 * Lets not return to userland just yet. It's constly and
+	 * Lets not return to userland just yet. It's costly and
 	 * it's likely we have more R2 instructions to emulate
 	 */
 	if (!err && (pass++ < MIPS_R2_EMUL_TOTAL_PASS)) {