[U-Boot] [PATCH 18/19] binman: Rename fdt variable to dtb

[sjg at google.com]

Since fdt is the name of a module, use a different name for variables to
avoid a conflict.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 tools/binman/control.py                     | 10 +++++-----
 tools/binman/etype/u_boot_dtb_with_ucode.py |  9 ++++-----
 tools/binman/func_test.py                   |  4 ++--
 3 files changed, 11 insertions(+), 12 deletions(-)

Applied to u-boot-fdt/next, thanks!