target/arm/translate-vfp.c: Whitespace fixes

target/arm/translate-vfp.c: Whitespace fixes

In the code for handling VFP system register accesses there is some
stray whitespace after a unary '-' operator, and also some incorrect
indent in a couple of function prototypes.  We're about to move this
code to another file, so fix the code style issues first so
checkpatch doesn't complain about the code-movement patch.

Cc: qemu-stable@nongnu.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210618141019.10671-2-peter.maydell@linaro.org