hw/sh4: Coding style: Remove unnecessary casts

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Message-Id: <6cb1bcf24572ad8465c20b64fec81157f34bcbe9.1635541329.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

hw/timer/sh_timer.c

@@ -233,7 +233,7 @@ static void *sh_timer_init(uint32_t freq, int feat, qemu_irq irq)
 {
     sh_timer_state *s;
 
-    s = (sh_timer_state *)g_malloc0(sizeof(sh_timer_state));
+    s = g_malloc0(sizeof(*s));
     s->freq = freq;
     s->feat = feat;
     s->tcor = 0xffffffff;
@@ -358,7 +358,7 @@ void tmu012_init(MemoryRegion *sysmem, hwaddr base,
     tmu012_state *s;
     int timer_feat = (feat & TMU012_FEAT_EXTCLK) ? TIMER_FEAT_EXTCLK : 0;
 
-    s = (tmu012_state *)g_malloc0(sizeof(tmu012_state));
+    s = g_malloc0(sizeof(*s));
     s->feat = feat;
     s->timer[0] = sh_timer_init(freq, timer_feat, ch0_irq);
     s->timer[1] = sh_timer_init(freq, timer_feat, ch1_irq);