[PATCH] ppc32: Improve workaround for 74xx CPUs with broken BTIC

The previous workaround didn't enable the BTIC bit on CPUs where it is
broken.  However, it seems some firmwares will unconditionally set it,
so this new patch will actually _clear_ it on CPUs where it is broken.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc/kernel/cpu_setup_6xx.S

@@ -218,10 +218,10 @@ setup_745x_specifics:
 
 	/* All of the bits we have to set.....
 	 */
-	ori	r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE | HID0_LRSTK
+	ori	r11,r11,HID0_SGE | HID0_FOLD | HID0_BHTE | HID0_LRSTK | HID0_BTIC
 BEGIN_FTR_SECTION
-	ori	r11,r11,HID0_BTIC
-END_FTR_SECTION_IFCLR(CPU_FTR_NO_BTIC)
+	xori	r11,r11,HID0_BTIC
+END_FTR_SECTION_IFSET(CPU_FTR_NO_BTIC)
 BEGIN_FTR_SECTION
 	oris	r11,r11,HID0_DPM@h	/* enable dynamic power mgmt */
 END_FTR_SECTION_IFCLR(CPU_FTR_NO_DPM)