mips/cavium-octeon: Fix typo *must* in comment

Fixes: 5b3b1688 ("MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.")
Signed-off-by: NPaul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: NPaul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org

arch/mips/cavium-octeon/setup.c

@@ -844,7 +844,7 @@ void __init prom_init(void)
 	 * BIST should always be enabled when doing a soft reset. L2
 	 * Cache locking for instance is not cleared unless BIST is
 	 * enabled.  Unfortunately due to a chip errata G-200 for
-	 * Cn38XX and CN31XX, BIST msut be disabled on these parts.
+	 * Cn38XX and CN31XX, BIST must be disabled on these parts.
 	 */
 	if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
 	    OCTEON_IS_MODEL(OCTEON_CN31XX))