ARM: sti: Drop unused includes

Several includes are not needed, so drop them.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://lore.kernel.org/r/20230803-dt-header-cleanups-for-soc-v2-2-d8de2cc88bff@kernel.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/mach-sti/board-dt.c

@@ -4,8 +4,6 @@
  * Author(s): Srinivas Kandagatla <srinivas.kandagatla@st.com>
  */
 
-#include <linux/irq.h>
-#include <linux/of_platform.h>
 #include <asm/hardware/cache-l2x0.h>
 #include <asm/mach/arch.h>