[ARM] pxa: allow clk aliases

We need to support more than one name+device for a struct clk for a
small number of peripherals.  We do this by re-using struct clk alias
to another struct clk - IOW, if we find that the entry we're using is
an alias, we return the aliased entry not the one we found.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/clock.c

@@ -47,6 +47,9 @@ struct clk *clk_get(struct device *dev, const char *id)
 		clk = p;
 	mutex_unlock(&clocks_mutex);
 
+	if (!IS_ERR(clk) && clk->ops == NULL)
+		clk = clk->other;
+
 	return clk;
 }
 EXPORT_SYMBOL(clk_get);