bancha: do not load eflash

We cannot (currently) run from eflash so there's no reason to load
an image.

Bypass-Presubmit-Reason:tested as part of chain

Change-Id: I4ce067167ebe3ed465469f086a155c1c13e54efa

bancha.resc

diff --git a/bancha.resc b/bancha.resc
index 6a106a0..8eebc96 100644
--- a/bancha.resc
+++ b/bancha.resc
@@ -67,8 +67,9 @@
 $tar ?= @out/cheriot/bancha/release/ext_flash.tar
 $spi_flash_load_address ?= 0x44000000
 $sc_bin ?= @out/cheriot/bancha/release/tmp/cheriot-firmware.bin
-$eflash_address ?= 0x20000000
-sysbus LoadBinary $sc_bin $eflash_address
+# NB: cannot load from eflash so do not populate
+#$eflash_address ?= 0x20000000
+#sysbus LoadBinary $sc_bin $eflash_address
 sysbus LoadBinary $tar $spi_flash_load_address
 #sysbus LoadSymbolsFrom $cheriot_elf