[AVR] Define the ROL instruction as an alias of ADC

The 'rol Rd' instruction is equivalent to 'adc Rd'.

This caused compile warnings from tablegen because of conflicting bits
shared between each instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341275 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed