sh: Add support for AP-SH4A-4A board

The AP-SH4A-4A board has SH7734, 64MB DDR2-SDRAM, USB,
Ethernet, and more.

This patch supports the following functions:
  - 64MB DDR2-SDRAM
  - 16MB NOR Flash memory
  - Serial console (SCIF)
  - Ethernet (SH-Ether with Gigabit)
  - I2C

Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/boards.cfg b/boards.cfg
index 50adef3..d21eae5 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -1029,6 +1029,7 @@
 sh7785lcr                    sh          sh4         sh7785lcr           renesas        -
 sh7785lcr_32bit              sh          sh4         sh7785lcr           renesas        -           sh7785lcr:SH_32BIT=1
 r0p7734                      sh          sh4         r0p7734             renesas        -
+ap_sh4a_4a                   sh          sh4         ap_sh4a_4a          alphaproject   -
 grsim_leon2                  sparc       leon2       -                   gaisler
 gr_cpci_ax2000               sparc       leon3       -                   gaisler
 gr_ep2s60                    sparc       leon3       -                   gaisler