gadget: fix build

drivers/usb/gadget/f_mass_storage.c: In function 'do_read_toc':
drivers/usb/gadget/f_mass_storage.c:1506:6: warning: unused variable 'msf' [-Wunused-variable]

Change-Id: I5b50ec1d7678f83e979e74e2033c3b15120ae0da
mach-tegra: remove board-olympus-keypad from makefile

The file was removed on commit "more cleaning, some fixes, new drivers"

Change-Id: I8b53514e58395c8efc2d92a41d9a223c409f76fe