[POWERPC] Typo fixes interrrupt -> interrupt

This fixes some interrrupt -> interrupt typos.

Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/iseries/it_lp_naca.h b/arch/powerpc/platforms/iseries/it_lp_naca.h
index 9bbf589..cf6dcf6 100644
--- a/arch/powerpc/platforms/iseries/it_lp_naca.h
+++ b/arch/powerpc/platforms/iseries/it_lp_naca.h
@@ -60,7 +60,7 @@
 	u8	xRsvd2_0[128];		// Reserved			x00-x7F
 
 // CACHE_LINE_3-6 0x0100 - 0x02FF Contains LP Queue indicators
-// NB: Padding required to keep xInterrruptHdlr at x300 which is required
+// NB: Padding required to keep xInterruptHdlr at x300 which is required
 // for v4r4 PLIC.
 	u8	xOldLpQueue[128];	// LP Queue needed for v4r4	100-17F
 	u8	xRsvd3_0[384];		// Reserved			180-2FF