clk: sunxi: a20-gmac: fix kernel-doc warnings

Move the function kernel-doc comment to be immediately before the
function implementation, then add a function parameter description
to prevent kernel-doc warnings:

clk-a20-gmac.c:43: warning: expecting prototype for sun7i_a20_gmac_clk_setup(). Prototype was for SUN7I_A20_GMAC_GPIT() instead
clk-a20-gmac.c:53: warning: Function parameter or struct member 'node' not described in 'sun7i_a20_gmac_clk_setup'

Signed-off-by: Randy Dunlap <[e-mail]>
Cc: Emilio López <[e-mail]>
Cc: Michael Turquette <[e-mail]>
Cc: Stephen Boyd <[e-mail]>
Cc: <[e-mail]>
Cc: Chen-Yu Tsai <[e-mail]>
Cc: Jernej Skrabec <[e-mail]>
Cc: Samuel Holland <[e-mail]>
Cc: <[e-mail]>
Cc: <[e-mail]>
Reviewed-by: Andre Przywara <[e-mail]>
Acked-by: Jernej Skrabec <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jernej Skrabec <[e-mail]>

drivers/clk/sunxi/clk-a20-gmac.c

···
 
 static DEFINE_SPINLOCK(gmac_lock);
 
+
+#define SUN7I_A20_GMAC_GPIT	2
+#define SUN7I_A20_GMAC_MASK	0x3
+#define SUN7I_A20_GMAC_PARENTS	2
+
+static u32 sun7i_a20_gmac_mux_table[SUN7I_A20_GMAC_PARENTS] = {
+	0x00, /* Select mii_phy_tx_clk */
+	0x02, /* Select gmac_int_tx_clk */
+};
+
 /**
  * sun7i_a20_gmac_clk_setup - Setup function for A20/A31 GMAC clock module
+ * @node: &struct device_node for the clock
  *
  * This clock looks something like this
  *                               ________________________
···
  * enable/disable this clock to configure the required state. The clock
  * driver then responds by auto-reparenting the clock.
  */
-
-#define SUN7I_A20_GMAC_GPIT	2
-#define SUN7I_A20_GMAC_MASK	0x3
-#define SUN7I_A20_GMAC_PARENTS	2
-
-static u32 sun7i_a20_gmac_mux_table[SUN7I_A20_GMAC_PARENTS] = {
-	0x00, /* Select mii_phy_tx_clk */
-	0x02, /* Select gmac_int_tx_clk */
-};
-
 static void __init sun7i_a20_gmac_clk_setup(struct device_node *node)
 {
 	struct clk *clk;