subsystem: disk: stm32_sdmmc: use generic LL headers

Use generic LL headers instead of depending on soc.h.

Signed-off-by: Martin Jäger <martin@libre.solar>

subsys/disk/disk_access_stm32_sdmmc.c

@@ -14,6 +14,7 @@
 #include <drivers/gpio.h>
 #include <logging/log.h>
 #include <soc.h>
+#include <stm32_ll_rcc.h>
 
 LOG_MODULE_REGISTER(stm32_sdmmc);