powerpc: Various typo fixes

Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index fb2fb3e..c82eed9 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -698,7 +698,7 @@
 /* 
  * Format: 
  * ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
- * the '.' may be an abbrevation
+ * the '.' may be an abbreviation
  */
 static void check_location_string(struct seq_file *m, const char *c)
 {