ARM: 7609/1: disable errata work-arounds which access secure registers

ARM: 7609/1: disable errata work-arounds which access secure registers

In order to support secure and non-secure platforms in multi-platform
kernels, errata work-arounds that access secure only registers need to
be disabled. Make all the errata options that fit in this category
depend on !CONFIG_ARCH_MULTIPLATFORM.

This will effectively remove the errata options as platforms are
converted over to multi-platform.

Signed-off-by: Rob Herring <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Signed-off-by: Russell King <[email protected]>