xen/riscv: avoid redundant HGATP*_MODE_SHIFT and HGATP*_VMID_SHIFT

It is sufficient to use HGATP*_MODE_MASK and HGATP*_VMID_MASK without
the corresponding *_SHIFT definitions.

Rename HGATP{32,64}_PPN to HGATP{32,64}_PPN_MASK to more accurately
describe their purpose. The top-level HGATP_PPN and related aliases are
updated accordingly.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

xen/arch/riscv/include/asm/riscv_encoding.h

@@ -132,15 +132,11 @@
 #define HGATP_MODE_SV39X4		_UL(8)
 #define HGATP_MODE_SV48X4		_UL(9)
 
-#define HGATP32_MODE_SHIFT		31
-#define HGATP32_VMID_SHIFT		22
 #define HGATP32_VMID_MASK		_UL(0x1FC00000)
-#define HGATP32_PPN			_UL(0x003FFFFF)
+#define HGATP32_PPN_MASK		_UL(0x003FFFFF)
 
-#define HGATP64_MODE_SHIFT		60
-#define HGATP64_VMID_SHIFT		44
 #define HGATP64_VMID_MASK		_ULL(0x03FFF00000000000)
-#define HGATP64_PPN			_ULL(0x00000FFFFFFFFFFF)
+#define HGATP64_PPN_MASK		_ULL(0x00000FFFFFFFFFFF)
 
 #define PMP_R				_UL(0x01)
 #define PMP_W				_UL(0x02)
@@ -166,10 +162,8 @@
 #define SATP_MODE_SHIFT			SATP64_MODE_SHIFT
 #define SATP_PPN_MASK			SATP64_PPN
 
-#define HGATP_PPN			HGATP64_PPN
-#define HGATP_VMID_SHIFT		HGATP64_VMID_SHIFT
+#define HGATP_PPN_MASK			HGATP64_PPN_MASK
 #define HGATP_VMID_MASK			HGATP64_VMID_MASK
-#define HGATP_MODE_SHIFT		HGATP64_MODE_SHIFT
 #else
 #define MSTATUS_SD			MSTATUS32_SD
 #define SSTATUS_SD			SSTATUS32_SD
@@ -177,10 +171,8 @@
 #define SATP_MODE_SHIFT			SATP32_MODE_SHIFT
 #define SATP_PPN_MASK			SATP32_PPN
 
-#define HGATP_PPN			HGATP32_PPN
-#define HGATP_VMID_SHIFT		HGATP32_VMID_SHIFT
+#define HGATP_PPN_MASK			HGATP32_PPN_MASK
 #define HGATP_VMID_MASK			HGATP32_VMID_MASK
-#define HGATP_MODE_SHIFT		HGATP32_MODE_SHIFT
 #endif
 
 #define TOPI_IID_SHIFT			16