sony-laptop: rename SONY_LAPTOP_OLD to a more meaningful SONYPI_COMPAT

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 877e790..2f2fbff 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -130,7 +130,7 @@
 
 	  Read <file:Documentation/sony-laptop.txt> for more information.
 
-config SONY_LAPTOP_OLD
+config SONYPI_COMPAT
 	bool "Sonypi compatibility"
 	depends on SONY_LAPTOP
 	  ---help---