MIPS: Fix comments typo

Remove the repeated word "as" in comments.
Signed-off-by: Shaomin Deng <dengshaomin@cdjrlc.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/cavium-octeon/setup.c

@@ -530,7 +530,7 @@ void octeon_user_io_init(void)
 	/* Get the current settings for CP0_CVMMEMCTL_REG */
 	cvmmemctl.u64 = read_c0_cvmmemctl();
 	/* R/W If set, marked write-buffer entries time out the same
-	 * as as other entries; if clear, marked write-buffer entries
+	 * as other entries; if clear, marked write-buffer entries
 	 * use the maximum timeout. */
 	cvmmemctl.s.dismarkwblongto = 1;
 	/* R/W If set, a merged store does not clear the write-buffer