ARM: stm32: Use CONFIG_TFTP_TSIZE on DHSOM

Long TFTP transfers lead to a wall of # characters on UART, which in
the end may slow down the transfer itself. Use CONFIG_TFTP_TSIZE to
print progress in fewer # characters.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/configs/stm32mp15_dhcom_basic_defconfig b/configs/stm32mp15_dhcom_basic_defconfig
index 0ff015c..7f7aecf 100644
--- a/configs/stm32mp15_dhcom_basic_defconfig
+++ b/configs/stm32mp15_dhcom_basic_defconfig
@@ -80,6 +80,7 @@
 CONFIG_SPL_ENV_IS_NOWHERE=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_IP_DEFRAG=y
+CONFIG_TFTP_TSIZE=y
 CONFIG_STM32_ADC=y
 CONFIG_SPL_BLOCK_CACHE=y
 CONFIG_DFU_MMC=y