ATMEL: remove old atmel_mci driver

All boards are using the gen_atmel_mci driver now, so no need
to carry the old driver around.

Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/doc/README.atmel_mci b/doc/README.atmel_mci
index 0cbd909..1ec4465 100644
--- a/doc/README.atmel_mci
+++ b/doc/README.atmel_mci
@@ -20,7 +20,7 @@
 
 example: this is added to at91sam9260_devices.c:
 
-#if defined(CONFIG_ATMEL_MCI) || defined(CONFIG_GENERIC_ATMEL_MCI)
+#if defined(CONFIG_GENERIC_ATMEL_MCI)
 void at91_mci_hw_init(void)
 {
 	at91_set_a_periph(AT91_PIO_PORTA, 8, PUP);	/* MCCK */