Turn on stack call wa

Turn on stack call wa by default for IGC.

2nd try: after forcing calla's operands to be grf-aligned due to hw bug.

Author: jgu222

IGC/common/igc_flags.h

@@ -42,7 +42,7 @@ DECLARE_IGC_REGKEY(DWORD, NoMaskWA,                     2,     "Add NoMask WA us
                                                                                             2 (nested divergent BB), 3 (=2). \
                                                                                  bit[2]   : how to add WA - 0 (optim, per-BB) | 1 (simple, ie, per-inst)", false)
 DECLARE_IGC_REGKEY(bool, ForceNoMaskWA,                 false, "[tmp, testing] Force NoMaskWA on any platforms", false)
-DECLARE_IGC_REGKEY(bool, EnableCallWA,                  false, "Enable call WA when EU fusion is on", false)
+DECLARE_IGC_REGKEY(bool, EnableCallWA,                  true,  "Enable call WA when EU fusion is on", false)
 DECLARE_IGC_REGKEY(bool, ForceSubReturn,                true,  "If a subroutine does not have a return, generate a dummy return if this key is set (to meet visa requirement)", false)
 DECLARE_IGC_REGKEY(DWORD,UnifiedSendCycle,              0,     "Using unified send cycle.", false)
 DECLARE_IGC_REGKEY(DWORD,DisableMixMode,                0,     "Disables mix mode in vISA BE.", false)