hw/sd.c: make sd_dataready() return bool

For the sake of code clarity

Signed-off-by: Igor Mitsyanko <i.mitsyanko@samsung.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/sd.c

diff --git a/hw/sd.c b/hw/sd.c
index ebc4e7c..209bc19 100644
--- a/hw/sd.c
+++ b/hw/sd.c
@@ -1703,7 +1703,7 @@
     return ret;
 }
 
-int sd_data_ready(SDState *sd)
+bool sd_data_ready(SDState *sd)
 {
     return sd->state == sd_sendingdata_state;
 }

hw/sd.h

diff --git a/hw/sd.h b/hw/sd.h
index d25342f..4eb9679 100644
--- a/hw/sd.h
+++ b/hw/sd.h
@@ -73,7 +73,7 @@
 void sd_write_data(SDState *sd, uint8_t value);
 uint8_t sd_read_data(SDState *sd);
 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert);
-int sd_data_ready(SDState *sd);
+bool sd_data_ready(SDState *sd);
 void sd_enable(SDState *sd, bool enable);
 
 #endif	/* __hw_sd_h */