[PATCH v3 18/46] boot: pxe: Use bootm_...() functions where possible

[Simon Glass]

Rather than building a command line for each operation, use the
functions provided by the bootm API.

Make sure that the bootm functions are available if pxe_utils is used.

Since SYS_BOOTM_LEN is not present for the tools-only build, adjust the
code to handle that.

Signed-off-by: Simon Glass <sjg at chromium.org>
Reviewed-by: Quentin Schulz <quentin.schulz at cherry.de>
---

(no changes since v1)

 boot/Makefile    |  2 +-
 boot/pxe_utils.c | 43 ++++++++++++++++++++-----------------------
 2 files changed, 21 insertions(+), 24 deletions(-)

Applied to sjg/master, thanks!