RISC-V/libgcc: Save/Restore routines for E goes with ABI.

That Save/Restore routines for E can be used for RVI with ILP32E ABI.

libgcc/ChangeLog:

	* config/riscv/save-restore.S: Check with __riscv_abi_rve rather than
	__riscv_32e.

libgcc/config/riscv/save-restore.S

@@ -295,7 +295,7 @@ FUNC_END (__riscv_restore_0)
 
 #else
 
-#ifdef __riscv_32e
+#ifdef __riscv_abi_rve
 FUNC_BEGIN(__riscv_save_2)
 FUNC_BEGIN(__riscv_save_1)
 FUNC_BEGIN(__riscv_save_0)
@@ -529,6 +529,6 @@ FUNC_END (__riscv_restore_2)
 FUNC_END (__riscv_restore_1)
 FUNC_END (__riscv_restore_0)
 
-#endif /* __riscv_32e */
+#endif /* __riscv_abi_rve */
 
 #endif /* __riscv_xlen == 64 */