powerpc: Fix misspellings in comments.

Signed-off-by: Adam Buchbinder <adam.buchbinder@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/boot/rs6000.h

@@ -239,5 +239,5 @@ struct external_reloc {
 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 #define DEFAULT_TEXT_SECTION_ALIGNMENT 4
-/* For new sections we havn't heard of before */
+/* For new sections we haven't heard of before */
 #define DEFAULT_SECTION_ALIGNMENT 4

arch/powerpc/boot/treeboot-akebono.c

@@ -38,7 +38,7 @@
 
 BSS_STACK(4096);
 
-#define SPRN_PIR	0x11E	/* Processor Indentification Register */
+#define SPRN_PIR	0x11E	/* Processor Identification Register */
 #define USERDATA_LEN	256	/* Length of userdata passed in by PIBS */
 #define MAX_RANKS	0x4
 #define DDR3_MR0CF	0x80010011U

arch/powerpc/boot/treeboot-currituck.c

@@ -80,7 +80,7 @@ static void ibm_currituck_fixups(void)
 	}
 }
 
-#define SPRN_PIR	0x11E	/* Processor Indentification Register */
+#define SPRN_PIR	0x11E	/* Processor Identification Register */
 void platform_init(void)
 {
 	unsigned long end_of_ram, avail_ram;

arch/powerpc/boot/treeboot-iss4xx.c

@@ -59,7 +59,7 @@ static void *iss_4xx_vmlinux_alloc(unsigned long size)
 	return (void *)ibm4xx_memstart;
 }
 
-#define SPRN_PIR	0x11E	/* Processor Indentification Register */
+#define SPRN_PIR	0x11E	/* Processor Identification Register */
 void platform_init(void)
 {
 	unsigned long end_of_ram = 0x08000000;