bionic: Fix build with some versions of gas

Some versions of gas, most notably 2.23.1 and 2.23.2, choke on extra
whitespace between brackets and register arguments.
Code without the extraneous whitespace works fine with all versions of
gas.

Change-Id: Iacfaf440d045e6c05544a8865d6196fa17fab331
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
1 file changed