Update U-Boot's build timestamp on every compile

Use the GNU 'date' command to auto-generate a new U-Boot
timestamp on every compile.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/include/configs/NETPHONE.h b/include/configs/NETPHONE.h
index a147aff..34de947 100644
--- a/include/configs/NETPHONE.h
+++ b/include/configs/NETPHONE.h
@@ -799,7 +799,7 @@
 #define CONFIG_CDP_DEVICE_ID_PREFIX	"NP"	/* netphone */
 #define CONFIG_CDP_PORT_ID		"eth%d"
 #define CONFIG_CDP_CAPABILITIES		0x00000010
-#define CONFIG_CDP_VERSION		"u-boot" " " __DATE__ " " __TIME__
+#define CONFIG_CDP_VERSION		"u-boot" " " U_BOOT_DATE " " U_BOOT_TIME
 #define CONFIG_CDP_PLATFORM		"Intracom NetPhone"
 #define CONFIG_CDP_TRIGGER		0x20020001
 #define CONFIG_CDP_POWER_CONSUMPTION	4300	/* 90 mA @ 48V */
diff --git a/include/configs/NETTA.h b/include/configs/NETTA.h
index 63810b3..004b3c8 100644
--- a/include/configs/NETTA.h
+++ b/include/configs/NETTA.h
@@ -775,7 +775,7 @@
 #define CONFIG_CDP_DEVICE_ID_PREFIX	"NT"	/* netta */
 #define CONFIG_CDP_PORT_ID		"eth%d"
 #define CONFIG_CDP_CAPABILITIES		0x00000010
-#define CONFIG_CDP_VERSION		"u-boot 1.0" " " __DATE__ " " __TIME__
+#define CONFIG_CDP_VERSION		"u-boot 1.0" " " U_BOOT_DATE " " U_BOOT_TIME
 #define CONFIG_CDP_PLATFORM		"Intracom NetTA"
 #define CONFIG_CDP_TRIGGER		0x20020001
 #define CONFIG_CDP_POWER_CONSUMPTION	4300	/* 90 mA @ 48V */
diff --git a/include/configs/NETTA2.h b/include/configs/NETTA2.h
index 61c5547..70995fa 100644
--- a/include/configs/NETTA2.h
+++ b/include/configs/NETTA2.h
@@ -750,7 +750,7 @@
 #define CONFIG_CDP_DEVICE_ID_PREFIX	"NT"	/* netta2 */
 #define CONFIG_CDP_PORT_ID		"eth%d"
 #define CONFIG_CDP_CAPABILITIES		0x00000010
-#define CONFIG_CDP_VERSION		"u-boot" " " __DATE__ " " __TIME__
+#define CONFIG_CDP_VERSION		"u-boot" " " U_BOOT_DATE " " U_BOOT_TIME
 #define CONFIG_CDP_PLATFORM		"Intracom NetTA2"
 #define CONFIG_CDP_TRIGGER		0x20020001
 #define CONFIG_CDP_POWER_CONSUMPTION	4300	/* 90 mA @ 48V */