[AMDGPU] Definitions of new gfx1250 HW_REG_MODE fields. NFC. (#156527)

Author: rampitec

llvm/lib/Target/AMDGPU/SIDefines.h

@@ -572,7 +572,17 @@ enum ModeRegisterMasks : uint32_t {
 
   GPR_IDX_EN_MASK = 1 << 27,
   VSKIP_MASK = 1 << 28,
-  CSP_MASK = 0x7u << 29 // Bits 29..31
+  CSP_MASK = 0x7u << 29, // Bits 29..31
+
+  // GFX1250
+  DST_VGPR_MSB = 1 << 12,
+  SRC0_VGPR_MSB = 1 << 13,
+  SRC1_VGPR_MSB = 1 << 14,
+  SRC2_VGPR_MSB = 1 << 15,
+  VGPR_MSB_MASK = 0xf << 12, // Bits 12..15
+
+  REPLAY_MODE = 1 << 25,
+  FLAT_SCRATCH_IS_NV = 1 << 26,
 };
 
 } // namespace Hwreg