arm64/fpsimd: Remove duplicate SYS_SVCR read

It seems to be a typo, remove the duplicate SYS_SVCR read.

Signed-off-by: Schspa Shi <schspa@gmail.com>
Link: https://lore.kernel.org/r/20220629051023.18173-1-schspa@gmail.com


Signed-off-by: Will Deacon <will@kernel.org>