Input: tsc2007 - make init/exit platform hw callbacks optional
Input: tsc2007 - make init/exit platform hw callbacks optional

Make init_platform_hw and exit_platform_hw callbacks optional since
they are not needed on all platforms.

Signed-off-by: Richard Röjfors <66a54d5fd9c41bbec23d4dc6489c27b43b56f41e@mocean-labs.com>
Signed-off-by: Dmitry Torokhov <10a8c465cefc9bdd6c925e26964d23c90f1141cc@mail.ru>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs