ARM: 6751/1: vexpress: select applicable errata workarounds in Kconfig

The Cortex-A9 tile on the Versatile Express suffers from a number of
engineering errata.

This patch selects workarounds in the ARCH_VEXPRESS_CA9X4 Kconfig entry
so that users don't need to worry about which ones to apply.

Reported-by: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-vexpress/Kconfig b/arch/arm/mach-vexpress/Kconfig
index 3f19b66..9311484 100644
--- a/arch/arm/mach-vexpress/Kconfig
+++ b/arch/arm/mach-vexpress/Kconfig
@@ -5,5 +5,8 @@
 	bool "Versatile Express Cortex-A9x4 tile"
 	select CPU_V7
 	select ARM_GIC
+	select ARM_ERRATA_720789
+	select ARM_ERRATA_751472
+	select ARM_ERRATA_753970
 
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