net: mvpp2: make mvpp2_read_relaxed static

In the Marvell PPv2 driver the mvpp2_read_relaxed function is only used
in a single file. Make it static and remove its prototype from the
header.
Signed-off-by: NAntoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/marvell/mvpp2/mvpp2.h

@@ -1097,8 +1097,6 @@ struct mvpp2_bm_pool {
 void mvpp2_write(struct mvpp2 *priv, u32 offset, u32 data);
 u32 mvpp2_read(struct mvpp2 *priv, u32 offset);
 
-u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset);
-
 void mvpp2_dbgfs_init(struct mvpp2 *priv, const char *name);
 
 void mvpp2_dbgfs_cleanup(struct mvpp2 *priv);

drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c

@@ -82,7 +82,7 @@ u32 mvpp2_read(struct mvpp2 *priv, u32 offset)
 	return readl(priv->swth_base[0] + offset);
 }
 
-u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset)
+static u32 mvpp2_read_relaxed(struct mvpp2 *priv, u32 offset)
 {
 	return readl_relaxed(priv->swth_base[0] + offset);
 }