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-mips/pci/bridge.h b/include/asm-mips/pci/bridge.h
index b84feeb..5f4b9d4 100644
--- a/include/asm-mips/pci/bridge.h
+++ b/include/asm-mips/pci/bridge.h
@@ -538,7 +538,7 @@
 		 BRIDGE_ISR_PMU_ESIZE_FAULT)
 
 /*
- * List of Errors which are fatal and kill the sytem
+ * List of Errors which are fatal and kill the system
  */
 #define BRIDGE_ISR_ERROR_FATAL		\
 		((BRIDGE_ISR_XTALK_ERROR & ~BRIDGE_ISR_XREAD_REQ_TIMEOUT)|\