mobicore: rename variable to lower case.

Rename variable mmapResp to mmap_resp in order to meet
the coding guidelines.

Change-Id: Icc4b712b62e9bf16a65c5af4e96dc9ef2cac9b18
Signed-off-by: Lukas Hänel <lukas.haenel@gi-de.com>
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>