Revert "ramips: fix read mac for jdcloud re-sp-01b again"

No longer required since commit 3410ad2f40 ("base-files: enable
 get_mac_ascii() to handle redundant strings").

This reverts commit 6e7537a049.

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>

target/linux/ramips/mt7621/base-files/etc/board.d/02_network

@@ -287,7 +287,7 @@ ramips_setup_macs()
 		wan_mac=$(macaddr_add "$lan_mac" 1)
 		;;
 	jdcloud,re-sp-01b)
-		lan_mac=$(macaddr_canonicalize "$(strings "$(find_mtd_part config)" | sed -n 's/^'"mac"'=//p' | head -n1)")
+		lan_mac=$(mtd_get_mac_ascii config mac)
 		wan_mac=$lan_mac
 		label_mac=$lan_mac
 		;;

target/linux/ramips/mt7621/base-files/etc/hotplug.d/ieee80211/10_fix_wifi_mac

@@ -134,7 +134,7 @@ case "$board" in
 			macaddr_setbit_la "$(mtd_get_mac_binary Factory 0x4)" > /sys${DEVPATH}/macaddress
 		;;
 	jdcloud,re-sp-01b)
-		addr=$(macaddr_canonicalize "$(strings "$(find_mtd_part config)" | sed -n 's/^'"mac"'=//p' | head -n1)")
+		addr=$(mtd_get_mac_ascii config mac)
 		[ "$PHYNBR" = "0" ] && echo $addr > /sys${DEVPATH}/macaddress
 		[ "$PHYNBR" = "1" ] && macaddr_add $addr 0x800000 > /sys${DEVPATH}/macaddress
 		;;