kernel: add missing symbol for 5.15

Driver for the National Semiconductor DP83640 PHYTER (DP83640_PHY) [N/m/y/?] (NEW)

Signed-off-by: Koen Vandeputte <[email protected]>

target/linux/generic/config-5.15

@@ -1466,6 +1466,7 @@ CONFIG_DMA_NONCOHERENT_MMAP=y
 # CONFIG_DNOTIFY is not set
 # CONFIG_DNS_RESOLVER is not set
 CONFIG_DOUBLEFAULT=y
+# CONFIG_DP83640_PHY is not set
 # CONFIG_DP83822_PHY is not set
 # CONFIG_DP83848_PHY is not set
 # CONFIG_DP83867_PHY is not set