qca-ssdk: enable AQR for ipq60xx targets

MR7500 features IPQ6018 which is CPPE, however, it also utilizes AQR114CB0 as WAN.
Previously, without this patch, aquantia_phy_api_ops was never called.
Therefore, enable `IN_AQUATIA_PHY` so that AQR PHY gets initialized properly on boot.

[    3.973942] Aquantia AQR114C 90000.mdio-1:08: loading firmware version 'v5.6.5 Cybertan Divo 090221 14:43:44' from 'NVMEM'
[   16.059953] aquantia_phy_api_ops_init[1485]:INFO:qca probe aquantia phy driver succeeded!
[   17.930149] Aquantia AQR114C 90000.mdio-1:08: attached PHY driver (mii_bus:phy_addr=90000.mdio-1:08, irq=POLL)

Signed-off-by: Weikai Kong <priv@pppig236.com>
Link: openwrt/openwrt#18185
Signed-off-by: Robert Marko <robimarko@gmail.com>

Author: PIPIPIG233666

package/kernel/qca-ssdk/Makefile

@@ -57,7 +57,8 @@ ifeq ($(CONFIG_TARGET_SUBTARGET), "ipq807x")
 endif
 
 ifeq ($(CONFIG_TARGET_SUBTARGET), "ipq60xx")
-    MAKE_FLAGS+= CHIP_TYPE=CPPE
+    MAKE_FLAGS+= CHIP_TYPE=CPPE \
+                 IN_AQUANTIA_PHY=TRUE
 endif
 
 ifeq ($(CONFIG_TARGET_SUBTARGET), "ipq50xx")