staging: android: ashmem: convert range macros to inlines

Convert range_size and range_on_lru macros to inline functions to
fix checkpatch check:

  CHECK: Macro argument reuse 'range' - possible side-effects?

Signed-off-by: Guillaume Tucker <guillaume.tucker@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>