[make] rename DEFINES to GLOBAL_DEFINES

To fix your module makefiles:
-Change DEFINES to GLOBAL_DEFINES

target/beagle/rules.mk

@@ -10,6 +10,6 @@ MODULES += \
 
 MEMSIZE := 0x08000000	# 128MB
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	SDRAM_SIZE=$(MEMSIZE)
 

target/beaglebone/rules.mk

@@ -11,7 +11,7 @@ MODULES += \
 
 MEMSIZE := 0x10000000	# 256MB
 
-DEFINES += \
+GLOBAL_DEFINES += \
 
 #include make/module.mk
 

target/osk5912/rules.mk

@@ -12,7 +12,7 @@ MODULE_SRCS += \
 
 MEMSIZE := 0x02000000	# 32MB
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	SDRAM_SIZE=$(MEMSIZE) \
 	SMC91C96_BASE_ADDR=0x04800300 \
 	SMC91C96_IRQ=0

target/realview-pb/rules.mk

@@ -9,7 +9,7 @@ PLATFORM := realview-pb
 
 MODULES += \
 
-DEFINES += \
+GLOBAL_DEFINES += \
 
 #include make/module.mk
 

target/stellaris-launchpad/rules.mk

@@ -5,7 +5,7 @@ MODULE := $(LOCAL_DIR)
 STELLARIS_CHIP := LM4F120H5QR
 PLATFORM := stellaris
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	TARGET_HAS_DEBUG_LED=1
 
 GLOBAL_INCLUDES += $(LOCAL_DIR)/include

target/stm32-h103/rules.mk

@@ -6,7 +6,7 @@ STM32_CHIP := stm32f103_md
 
 PLATFORM := stm32f1xx
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	ENABLE_UART1=1 \
 	TARGET_HAS_DEBUG_LED=1
 

target/stm32-p107/rules.mk

@@ -6,7 +6,7 @@ STM32_CHIP := stm32f107
 
 PLATFORM := stm32f1xx
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	ENABLE_UART3=1 \
 	TARGET_HAS_DEBUG_LED=1
 

target/stm32-p407/rules.mk

@@ -6,7 +6,7 @@ STM32_CHIP := stm32f407
 
 PLATFORM := stm32f2xx
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	ENABLE_UART3=1 \
 	TARGET_HAS_DEBUG_LED=1
 

target/stm3220g/rules.mk

@@ -6,7 +6,7 @@ STM32_CHIP := stm32f207
 
 PLATFORM := stm32f2xx
 
-DEFINES += \
+GLOBAL_DEFINES += \
 	ENABLE_UART3=1 \
 	TARGET_HAS_DEBUG_LED=1