x86: rename the struct pt_regs members for 32/64-bit consistency

We have a lot of code which differs only by the naming of specific
members of structures that contain registers.  In order to enable
additional unifications, this patch drops the e- or r- size prefix
from the register names in struct pt_regs, and drops the x- prefixes
for segment registers on the 32-bit side.

This patch also performs the equivalent renames in some additional
places that might be candidates for unification in the future.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/mce.h b/include/asm-x86/mce.h
index e6ff507..94f1fd7 100644
--- a/include/asm-x86/mce.h
+++ b/include/asm-x86/mce.h
@@ -13,7 +13,7 @@
 #define MCG_CTL_P	 (1UL<<8)   /* MCG_CAP register available */
 
 #define MCG_STATUS_RIPV  (1UL<<0)   /* restart ip valid */
-#define MCG_STATUS_EIPV  (1UL<<1)   /* eip points to correct instruction */
+#define MCG_STATUS_EIPV  (1UL<<1)   /* ip points to correct instruction */
 #define MCG_STATUS_MCIP  (1UL<<2)   /* machine check in progress */
 
 #define MCI_STATUS_VAL   (1UL<<63)  /* valid error */
@@ -30,7 +30,7 @@
 	__u64 misc;
 	__u64 addr;
 	__u64 mcgstatus;
-	__u64 rip;
+	__u64 ip;
 	__u64 tsc;	/* cpu time stamp counter */
 	__u64 res1;	/* for future extension */
 	__u64 res2;	/* dito. */