sh: convert to use __HEAD and HEAD_TEXT macros.

This has the consequence of changing the section name use for head
code from ".text.head" to ".head.text".  Since this commit changes all
users in the architecture, this change should be harmless.
Signed-off-by: Tim Abbott <tabbott@mit.edu>
Cc: Paul Mundt <lethal@linux-sh.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/sh/kernel/head_32.S

@@ -10,6 +10,7 @@
  *
  * Head.S contains the SH exception handlers and startup code.
  */
+#include <linux/init.h>
 #include <linux/linkage.h>
 #include <asm/thread_info.h>
 
@@ -40,7 +41,7 @@ ENTRY(empty_zero_page)
 1:
 	.skip	PAGE_SIZE - empty_zero_page - 1b
 
-	.section	.text.head, "ax"
+	__HEAD
 
 /*
  * Condition at the entry of _stext:

arch/sh/kernel/head_64.S

@@ -8,6 +8,9 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+
+#include <linux/init.h>
+
 #include <asm/page.h>
 #include <asm/cache.h>
 #include <asm/tlb.h>
@@ -110,7 +113,7 @@ empty_bad_pte_table:
 fpu_in_use:	.quad	0
 
 
-	.section	.text.head, "ax"
+	__HEAD
 	.balign L1_CACHE_BYTES
 /*
  * Condition at the entry of __stext:

arch/sh/kernel/vmlinux_32.lds.S

@@ -31,7 +31,7 @@ SECTIONS
 	} = 0
 
 	.text : {
-		*(.text.head)
+		HEAD_TEXT
 		TEXT_TEXT
 		SCHED_TEXT
 		LOCK_TEXT

arch/sh/kernel/vmlinux_64.lds.S

@@ -42,7 +42,7 @@ SECTIONS
 	} = 0
 
 	.text : C_PHYS(.text) {
-		*(.text.head)
+		HEAD_TEXT
 		TEXT_TEXT
 		*(.text64)
 		*(.text..SHmedia32)