Rename hush to cli_hush

Hush is a command-line interpreter, so rename it to make that clearer.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Makefile b/common/Makefile
index 219cb51..da184a8 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -11,7 +11,7 @@
 obj-y += command.o
 obj-y += exports.o
 obj-y += hash.o
-obj-$(CONFIG_SYS_HUSH_PARSER) += hush.o
+obj-$(CONFIG_SYS_HUSH_PARSER) += cli_hush.o
 obj-y += s_record.o
 obj-y += xyzModem.o
 obj-y += cmd_disk.o