Simplify 32-bit and 64-bit Intel SoCFPGA Kconfig options by having only
one for both of them.  After conversion of all
drivers to use the new ARCH_INTEL_SOCFPGA, the remaining ARM option can
be removed.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: NDinh Nguyen <dinguyen@kernel.org>