FMUv4 compile fix

src/modules/systemlib/param/param.c

@@ -795,7 +795,7 @@ param_load_default(void)
 
 #if defined (CONFIG_ARCH_BOARD_PX4FMU_V4)
 //struct spi_dev_s *dev = nullptr;
-irqstate_t state;
+irqstate_t irq_state;
 #endif
 
 static void
@@ -816,10 +816,10 @@ param_bus_lock(bool lock)
 
 	// we lock like this for Pixracer for now
 	if (lock) {
-		state = irqsave();
+		irq_state = irqsave();
 
 	} else {
-		irqrestore(state);
+		irqrestore(irq_state);
 	}
 
 #endif