Revert "staging: android: Use devm_kzalloc instead of kzalloc"

This reverts commit 506d127595bbfc918c934704e7b9a9663df97566.

Dorimanx:

This cause long vibrates when typing fast, should be short every click,
but its like: short short short long, short long... etc.

not nice. now in 100 clicks 3 long vibrates, and that is OK...