Retain the existing gen_aa32_* inlines, to aid compilation for A64.

Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRichard Henderson <rth@twiddle.net>
Message-id: 1386628626-21627-1-git-send-email-rth@twiddle.net
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>