linux.inc: drop RPSRC - it's unused now
linux.inc: drop RPSRC - it's unused now

Signed-off-by: Dmitry Eremin-Solenikov <b6edad08270b2e4ffbcb0879e25a0e29a48c5275@gmail.com>
Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

bluelightning/meta-handheld,bluelightning/meta-handheld