drivers: qe: Move CONFIG_U_QE to Kconfig

Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
[York S: revised subject line and removed commit message]
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/drivers/Kconfig b/drivers/Kconfig
index 56536c4..884a945 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -74,6 +74,8 @@
 
 source "drivers/pwm/Kconfig"
 
+source "drivers/qe/Kconfig"
+
 source "drivers/ram/Kconfig"
 
 source "drivers/remoteproc/Kconfig"