Store device's names and add more startup messages

drivers/bcm2835_videocore.c

@@ -113,6 +113,7 @@ int bcm2835_videocore_init_dev(struct fb *f, unsigned int color_depth) {
 }
 
 struct fb_dev videocore_dev = {
+	.name ="bcm2835_videocore",
 	.init = &bcm2835_videocore_init_dev
 };
 

drivers/pi_mini_uart.c

@@ -110,6 +110,7 @@ int mini_uart_putc(char c) {
 }
 
 struct serial_dev mini_uart_dev = {
+	.name = "pi_mini_uart",
 	.putc = &mini_uart_putc
 };
 

drivers/pl011.c

@@ -38,6 +38,7 @@ int pl011_putc(char c)
 }
 
 struct serial_dev pl011_dev = {
+	.name = "pl011",
 	.putc = &pl011_putc
 };
 

drivers/pl111.c

@@ -92,6 +92,7 @@ int pl111_init_dev(struct fb *f, unsigned int color_depth) {
 }
 
 struct fb_dev pl111_dev = {
+	.name = "pl111",
 	.init = &pl111_init_dev
 };