Remove unneeded idle commands from the command stream when updating pagetables and doing TLB flushes. Ths cuts down on the number of commands in the ringbuffer during switches. Change-Id: I8f1fa31db33c465ecdbd0ca897f4651f2670c4e4 Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>