ARM: STi: Set correct ARM ERRATAs.

Some of the ARM_ERRATA selection is not done in the initial SOC support
patches. This patch selects 2 new ARM_ERRATA's and removes one which was
actually fixed.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
[olof: reorder new errata entries]
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-sti/Kconfig

@@ -11,8 +11,9 @@ menuconfig ARCH_STI
 	select HAVE_SMP
 	select HAVE_ARM_SCU if SMP
 	select ARCH_REQUIRE_GPIOLIB
-	select ARM_ERRATA_720789
 	select ARM_ERRATA_754322
+	select ARM_ERRATA_764369
+	select ARM_ERRATA_775420
 	select PL310_ERRATA_753970 if CACHE_PL310
 	select PL310_ERRATA_769419 if CACHE_PL310
 	help