wlan: remove CONFIG prefix from CONFIG_ENABLE_LINUX_REG flag

In case of kernel BUILT in driver, Extra CONFIG prefix is added
before CONFIG_ENABLE_LINUX_REG which disables db.txt solution in
driver as CONFIG_CONFIG_ENABLE_LINUX_REG is not defined.
To mitigate this issue correcting typo to ENABLE_LINUX_REG from
CONFIG_ENABLE_LINUX_REG.

CRs-Fixed: 762559
Change-Id: I8a32d5ad1ca914f8548f36f2d66b74a0f161548b
diff --git a/Kconfig b/Kconfig
index d3f811b..5ed8eb1 100644
--- a/Kconfig
+++ b/Kconfig
@@ -45,7 +45,7 @@
 	bool "Enable Fast Transition (11r) feature"
 	default n
 
-config CONFIG_ENABLE_LINUX_REG
+config ENABLE_LINUX_REG
 	bool "Enable linux regulatory feature"
 	default n