firmware/nvram: bcm47xx: Don't use "proxy" headers

Update header inclusions to follow IWYU (Include What You Use)
principle.

Note that kernel.h is discouraged to be included as it's written
at the top of that file.

Signed-off-by: Andy Shevchenko <[e-mail]>
Reviewed-by: Florian Fainelli <[e-mail]>
Signed-off-by: Thomas Bogendoerfer <[e-mail]>

include/linux/bcm47xx_nvram.h

···
 
 #include <linux/errno.h>
 #include <linux/types.h>
-#include <linux/kernel.h>
 #include <linux/vmalloc.h>
 
 #ifdef CONFIG_BCM47XX_NVRAM

include/linux/bcm47xx_sprom.h

···
 #ifndef __BCM47XX_SPROM_H
 #define __BCM47XX_SPROM_H
 
+#include <linux/errno.h>
 #include <linux/types.h>
-#include <linux/kernel.h>
 #include <linux/vmalloc.h>
 
 struct ssb_sprom;