ppc: correct a comment on IMM operand in ppc.h
ppc: correct a comment on IMM operand in ppc.h

dynm/capstone,8l/capstone,krytarowski/capstone,angelabier1/capstone,bSr43/capstone,sephiroth99/capstone,pyq881120/capstone,fvrmatteo/capstone,07151129/capstone,nplanel/capstone,xia0pin9/capstone,code4bones/capstone,capturePointer/capstone,sephiroth99/capstone,bigendiansmalls/capstone,krytarowski/capstone,sigma-random/capstone,nplanel/capstone,techvoltage/capstone,xia0pin9/capstone,07151129/capstone,07151129/capstone,xia0pin9/capstone,angelabier1/capstone,zuloloxi/capstone,techvoltage/capstone,capturePointer/capstone,sephiroth99/capstone,bowlofstew/capstone,zuloloxi/capstone,bughoho/capstone,zuloloxi/capstone,dynm/capstone,nplanel/capstone,krytarowski/capstone,pombredanne/capstone,8l/capstone,code4bones/capstone,zneak/capstone,angelabier1/capstone,capturePointer/capstone,AmesianX/capstone,krytarowski/capstone,dynm/capstone,8l/capstone,bowlofstew/capstone,pyq881120/capstone,nplanel/capstone,AmesianX/capstone,xia0pin9/capstone,NeilBryant/capstone,bowlofstew/capstone,pombredanne/capstone,NeilBryant/capstone,pombredanne/capstone,NeilBryant/capstone,AmesianX/capstone,bigendiansmalls/capstone,sephiroth99/capstone,code4bones/capstone,pyq881120/capstone,techvoltage/capstone,zneak/capstone,fvrmatteo/capstone,techvoltage/capstone,bughoho/capstone,xia0pin9/capstone,pranith/capstone,bSr43/capstone,fvrmatteo/capstone,code4bones/capstone,bigendiansmalls/capstone,zuloloxi/capstone,capturePointer/capstone,capturePointer/capstone,nplanel/capstone,8l/capstone,AmesianX/capstone,krytarowski/capstone,krytarowski/capstone,AmesianX/capstone,8l/capstone,pyq881120/capstone,NeilBryant/capstone,AmesianX/capstone,07151129/capstone,pranith/capstone,pranith/capstone,sigma-random/capstone,bigendiansmalls/capstone,8l/capstone,zuloloxi/capstone,bigendiansmalls/capstone,angelabier1/capstone,pombredanne/capstone,bughoho/capstone,bowlofstew/capstone,zneak/capstone,bughoho/capstone,angelabier1/capstone,sephiroth99/capstone,capturePointer/capstone,fvrmatteo/capstone,sigma-random/capstone,pombredanne/capstone,krytarowski/capstone,sigma-random/capstone,capturePointer/capstone,dynm/capstone,pranith/capstone,bSr43/capstone,code4bones/capstone,zuloloxi/capstone,bSr43/capstone,bSr43/capstone,bowlofstew/capstone,dynm/capstone,bigendiansmalls/capstone,code4bones/capstone,dynm/capstone,8l/capstone,pyq881120/capstone,nplanel/capstone,sigma-random/capstone,fvrmatteo/capstone,sigma-random/capstone,pombredanne/capstone,bughoho/capstone,NeilBryant/capstone,nplanel/capstone,bughoho/capstone,NeilBryant/capstone,xia0pin9/capstone,angelabier1/capstone,07151129/capstone,sephiroth99/capstone,techvoltage/capstone,dynm/capstone,bSr43/capstone,bowlofstew/capstone,bughoho/capstone,sephiroth99/capstone,pranith/capstone,07151129/capstone,zneak/capstone,NeilBryant/capstone,pombredanne/capstone,code4bones/capstone,zneak/capstone,zuloloxi/capstone,fvrmatteo/capstone,07151129/capstone,AmesianX/capstone,zneak/capstone,bowlofstew/capstone,xia0pin9/capstone,pyq881120/capstone,techvoltage/capstone,sigma-random/capstone,pyq881120/capstone,angelabier1/capstone,bigendiansmalls/capstone,pranith/capstone,techvoltage/capstone,fvrmatteo/capstone,zneak/capstone,pranith/capstone,bSr43/capstone