Move console definitions into a new console.h file

The console includes a global variable and several functions that are only
used by a small subset of U-Boot files. Before adding more functions, move
the definitions into their own header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index c5e35ee..cfe9a24 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -9,6 +9,7 @@
  */
 
 #include <common.h>
+#include <console.h>
 #include <asm/errno.h>
 #include <linux/netdevice.h>
 #include <linux/usb/ch9.h>
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index abe9391..ec1f23a 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -243,6 +243,7 @@
 #include <config.h>
 #include <malloc.h>
 #include <common.h>
+#include <console.h>
 #include <g_dnl.h>
 
 #include <linux/err.h>
diff --git a/drivers/usb/gadget/f_thor.c b/drivers/usb/gadget/f_thor.c
index 9ed0ce3..a60e948 100644
--- a/drivers/usb/gadget/f_thor.c
+++ b/drivers/usb/gadget/f_thor.c
@@ -17,6 +17,7 @@
 
 #include <errno.h>
 #include <common.h>
+#include <console.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <version.h>
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 373e04c..6ef5190 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -7,6 +7,7 @@
  */
 
 #include <common.h>
+#include <console.h>
 #include <usb.h>
 #include <asm/io.h>
 
diff --git a/drivers/usb/musb-new/musb_uboot.c b/drivers/usb/musb-new/musb_uboot.c
index 10f6b5d..233a0e4 100644
--- a/drivers/usb/musb-new/musb_uboot.c
+++ b/drivers/usb/musb-new/musb_uboot.c
@@ -1,4 +1,5 @@
 #include <common.h>
+#include <console.h>
 #include <watchdog.h>
 #ifdef CONFIG_ARCH_SUNXI
 #include <asm/arch/usb_phy.h>