Enable HTTPD O2 optimize for GD32 boards

Add -DCONFIG_HTTPD_OPTIMIZE_O2 to several GD32 board configs to enable optimized HTTPD builds (BOARD_GD32F207RG, GD32F407RE, GD32F450VI, 16X4U_PIXEL, GD32F470VG, BW_OPIDMX4, DMX3, DMX4). Remove the BOARD_GD32F303CB block (MCU=GD32F303CB, CONFIG_STORE_USE_ROM and NO_EMAC). Also adjust ordering of DMX4 defines.

Author: vanvught

common/make/gd32/Board.mk

@@ -22,12 +22,7 @@ endif
 ifeq ($(strip $(BOARD)),BOARD_GD32F207RG)
 	MCU=GD32F207RG
 	DEFINES+=-DCONFIG_STORE_USE_SPI
-endif
-
-ifeq ($(strip $(BOARD)),BOARD_GD32F303CB)
-	MCU=GD32F303CB
-	DEFINES+=-DCONFIG_STORE_USE_ROM
-	DEFINES+=-DNO_EMAC
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_GD32F303RC)
@@ -39,18 +34,22 @@ endif
 ifeq ($(strip $(BOARD)),BOARD_GD32F407RE)
 	MCU=GD32F407RE
 	DEFINES+=-DCONFIG_STORE_USE_SPI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_GD32F450VI)
 	MCU=GD32F450VI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_16X4U_PIXEL)
 	MCU=GD32F450VI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_GD32F470VG)
 	MCU=GD32F470VG
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_GD32F207C_EVAL)
@@ -71,16 +70,19 @@ endif
 ifeq ($(strip $(BOARD)),BOARD_BW_OPIDMX4)
 	BOARD_DMX=4
 	DEFINES+=-DCONFIG_STORE_USE_SPI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_DMX3)
 	BOARD_DMX=3
 	DEFINES+=-DCONFIG_STORE_USE_SPI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifeq ($(strip $(BOARD)),BOARD_DMX4)
-	DEFINES+=-DCONFIG_STORE_USE_SPI
 	BOARD_DMX=4
+	DEFINES+=-DCONFIG_STORE_USE_SPI
+	DEFINES+=-DCONFIG_HTTPD_OPTIMIZE_O2
 endif
 
 ifdef BOARD_DMX