sh4: always perform hard-reset of sh4 and its registers

Fixes infinite loop after reboot

core/emulator.cpp

@@ -339,7 +339,7 @@ void dc_reset(bool hard)
 	if (hard)
 		_vmem_unprotect_vram(0, VRAM_SIZE);
 	devicesReset(hard);
-	sh4_cpu.Reset(hard);
+	sh4_cpu.Reset(true);
 	mem_Reset(hard);
 }
 

core/hw/sh4/sh4_mem.cpp

@@ -198,7 +198,7 @@ void mem_Reset(bool hard)
 
 	//Reset registers
 	sh4_area0_Reset(hard);
-	sh4_mmr_reset(hard);
+	sh4_mmr_reset(true);
 	MMU_reset();
 }