clk: qcom: Export gdsc_gx_do_nothing_enable() to modules

A clk driver can be a module but the gdsc code is in the common module.
Export this symbol so that allmodconfig builds keep working.

Cc: Jonathan Marek <jonathan@marek.ca>
Fixes: 0638226d ("clk: qcom: add common gdsc_gx_do_nothing_enable for gpucc drivers")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20200724094025.3261266-1-sboyd@kernel.org

drivers/clk/qcom/gdsc.c

@@ -6,6 +6,7 @@
 #include <linux/bitops.h>
 #include <linux/delay.h>
 #include <linux/err.h>
+#include <linux/export.h>
 #include <linux/jiffies.h>
 #include <linux/kernel.h>
 #include <linux/ktime.h>
@@ -458,3 +459,4 @@ int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain)
 	/* Do nothing but give genpd the impression that we were successful */
 	return 0;
 }
+EXPORT_SYMBOL_GPL(gdsc_gx_do_nothing_enable);