block: Migrate SystemACE chip to Kconfig

Migrate the base and sub-options to Kconfig.  Note that we only enable
this in the base sandbox config now.

Cc: Alexey Brodkin <alexey.brodkin@gmail.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
---
Is this driver still used anywhere?  It's fishy that it's only enabled
in sandbox anymore.
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 41a2e34..3acf908 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -80,6 +80,9 @@
 CONFIG_DEBUG_DEVRES=y
 CONFIG_ADC=y
 CONFIG_ADC_SANDBOX=y
+CONFIG_SYSTEMACE=y
+CONFIG_SYS_SYSTEMACE_BASE=0x0
+CONFIG_SYS_SYSTEMACE_WIDTH=16
 CONFIG_CLK=y
 CONFIG_CPU=y
 CONFIG_DM_DEMO=y