vidc: 1080p: IDR picture type support for H264 format

Read IDR picture type from 1080p core register set
and propagate it to user space using IDR frame type
enumeration in api header file. The IDR frame type
info is used in SYNCFRAME logic for H264 format in
userspace.

Change-Id: Ic677eb4d28469f6712832b7e09050467420eb70b
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>