Fix misspellings of "system", "controller", "interrupt" and "necessary".

Fix the various misspellings of "system", controller", "interrupt" and
"[un]necessary".

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
diff --git a/include/asm-sh/systemh7751.h b/include/asm-sh/systemh7751.h
index b143bb2..4161122 100644
--- a/include/asm-sh/systemh7751.h
+++ b/include/asm-sh/systemh7751.h
@@ -36,7 +36,7 @@
 #define PA_LED		0xba000000	/* LED */
 #define	PA_BCR		0xbb000000	/* FPGA on the MS7751SE01 */
 
-#define PA_MRSHPC	0xb83fffe0	/* MR-SHPC-01 PCMCIA controler */
+#define PA_MRSHPC	0xb83fffe0	/* MR-SHPC-01 PCMCIA controller */
 #define PA_MRSHPC_MW1	0xb8400000	/* MR-SHPC-01 memory window base */
 #define PA_MRSHPC_MW2	0xb8500000	/* MR-SHPC-01 attribute window base */
 #define PA_MRSHPC_IO	0xb8600000	/* MR-SHPC-01 I/O window base */