drivers: net: replace UINT64_MAX with U64_MAX

U64_MAX is well defined now while the UINT64_MAX is not, so we fall
back to drivers' own definition as below:

	#ifndef UINT64_MAX
	#define UINT64_MAX             (u64)(~((u64)0))
	#endif

I believe this is in one phy driver then copied and pasted to other phy
drivers.

Replace the UINT64_MAX with U64_MAX to clean up the source code.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/phy/bcm-phy-lib.c b/drivers/net/phy/bcm-phy-lib.c
index 5ad130c..0876aec 100644
--- a/drivers/net/phy/bcm-phy-lib.c
+++ b/drivers/net/phy/bcm-phy-lib.c
@@ -346,10 +346,6 @@ void bcm_phy_get_strings(struct phy_device *phydev, u8 *data)
 }
 EXPORT_SYMBOL_GPL(bcm_phy_get_strings);
 
-#ifndef UINT64_MAX
-#define UINT64_MAX              (u64)(~((u64)0))
-#endif
-
 /* Caller is supposed to provide appropriate storage for the library code to
  * access the shadow copy
  */
@@ -362,7 +358,7 @@ static u64 bcm_phy_get_stat(struct phy_device *phydev, u64 *shadow,
 
 	val = phy_read(phydev, stat.reg);
 	if (val < 0) {
-		ret = UINT64_MAX;
+		ret = U64_MAX;
 	} else {
 		val >>= stat.shift;
 		val = val & ((1 << stat.bits) - 1);