firmware: better specify the supported WiFi chip for basic AN7581 NPU FW

The basic AN7581 NPU FW also supports WiFi offload for MT7992 WiFi chip.
Add this information in the package description to clarify this.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

Author: Ansuel

package/firmware/linux-firmware/airoha.mk

@@ -17,7 +17,7 @@ endef
 $(eval $(call BuildPackage,airoha-en8811h-firmware))
 
 
-Package/airoha-en7581-npu-firmware = $(call Package/firmware-default,Airoha EN7581 NPU firmware,,LICENSE.airoha)
+Package/airoha-en7581-npu-firmware = $(call Package/firmware-default,Airoha EN7581+MT7992 NPU firmware,,LICENSE.airoha)
 define Package/airoha-en7581-npu-firmware/install
 	$(INSTALL_DIR) $(1)/lib/firmware/airoha
 	$(CP) \