staging: android: binder: use whitespace consistently

Whitespace between #define keyword and BINDER_* constants are space in
some point and tab in some point. Using space or tab is just writer's
choice. But, let's use them more consistently.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>