and add usermode parsing of LDM/STM ops
  This patch basically extends the ARM assembly reader a bit to properly parse CPSR and 
  SPSR flags for the MSR opcode, and allows the reader to understand 
  the ^ modifer for register lists for STMxx and LDMxx.

  Previously the following combinations weren't possible in straight assembler:
     MRS R0, CPSR
     MRS R0, SPSR
     MSR CPSR_CX, R0
     LDMIA SP, {R0-R15}^
     etc.. 

git-svn-id: trunk@22502 -