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/include/asm/pte-common.h b/arch/powerpc/include/asm/pte-common.h
index 2eeaf80..4ba26dd 100644
--- a/arch/powerpc/include/asm/pte-common.h
+++ b/arch/powerpc/include/asm/pte-common.h
@@ -96,7 +96,7 @@
 #define PTE_RPN_SHIFT	(PAGE_SHIFT)
 #endif
 
-/* The mask convered by the RPN must be a ULL on 32-bit platforms with
+/* The mask covered by the RPN must be a ULL on 32-bit platforms with
  * 64-bit PTEs
  */
 #if defined(CONFIG_PPC32) && defined(CONFIG_PTE_64BIT)