arm64/sve: Use the sve_flush macros in sve_load_from_fpsimd_state()

arm64/sve: Use the sve_flush macros in sve_load_from_fpsimd_state()

This makes the code a bit clearer and as a result we can also make the
indentation more normal, there is no change to the generated code.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210512151131.27877-3-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>