mfd: qcom_rpm: Remove unused define

This define RPM_SIGNAL probably pertains to the IPC signal which
we ended up fetching from the device tree instead. the define is
unused, remove it.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/mfd/qcom_rpm.c

@@ -71,8 +71,6 @@ struct qcom_rpm {
 #define RPM_NOTIFICATION	BIT(30)
 #define RPM_REJECTED		BIT(31)
 
-#define RPM_SIGNAL		BIT(2)
-
 static const struct qcom_rpm_resource apq8064_rpm_resource_table[] = {
 	[QCOM_RPM_CXO_CLK] =			{ 25, 9, 5, 1 },
 	[QCOM_RPM_PXO_CLK] =			{ 26, 10, 6, 1 },