powerpc: Fix page_ins details in lppaca comments

The page_ins member ends at byte 0x3, not 0x4. Also, fix up the
alignment.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/lppaca.h

@@ -133,7 +133,7 @@ struct lppaca {
 //=============================================================================
 // CACHE_LINE_4-5 0x0180 - 0x027F Contains PMC interrupt data
 //=============================================================================
-	u32	page_ins;			// CMO Hint - # page ins by OS  x00-x04
+	u32	page_ins;		// CMO Hint - # page ins by OS  x00-x03
 	u8	pmc_save_area[252];	// PMC interrupt Area           x04-xFF
 } __attribute__((__aligned__(0x400)));