CHROMIUMOS: chromeos_acpi: Introduce ability to handle buffers.

include/linux/chromeos_platform.h

 #ifndef _LINUX_CHROMEOS_PLATFORM_H
 #define _LINUX_CHROMEOS_PLATFORM_H
 
+#include <linux/errno.h>
 #include <linux/types.h>
 
 #ifdef CONFIG_CHROMEOS
 /*
  * ChromeOS platform support code. Glue layer between higher level functions
  * and per-platform firmware interfaces.
  */
 
 /* Checks whether ChromeOS platform was detected and initialized */
 extern bool chromeos_initialized(void);
 
 /* Checks to see if the current device is in devmode */
 extern bool chromeos_is_devmode(void);
 
 /*
  * Set the taint bit telling firmware that the currently running side needs
  * recovery (or reinstall).
  */
 extern int chromeos_set_need_recovery(void);
 
 #else
+
 /* Stubbed-out versions so we can keep code common */
 static inline bool chromeos_initialized(void)
 {
         return false;
 }
 
 static inline bool chromeos_is_devmode(void)
 {
         return true;
 }
 
 static inline int chromeos_set_need_recovery(void)
 {
         return -ENODEV;
 }
 #endif /* CONFIG_CHROMEOS */
 
 #endif /* _LINUX_CHROMEOS_PLATFORM_H */