Drop PCMCIA

This is no-longer used in U-Boot and has not been converted to driver
model. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/README b/README
index b493ffe..2d91619 100644
--- a/README
+++ b/README
@@ -83,7 +83,7 @@
   * Provide extended interface to Linux boot loader
   * S-Record download
   * network boot
-  * PCMCIA / CompactFlash / ATA disk / SCSI ... boot
+  * ATA disk / SCSI ... boot
 - create ARMBoot project (http://sourceforge.net/projects/armboot)
 - add other CPU families (starting with ARM)
 - create U-Boot project (http://sourceforge.net/projects/u-boot)