ARM: stm32: Use CONFIG_TFTP_TSIZE on STMicroelectronics boards

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: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
diff --git a/configs/stm32mp15_defconfig b/configs/stm32mp15_defconfig
index f6e7fc8..02b37e1 100644
--- a/configs/stm32mp15_defconfig
+++ b/configs/stm32mp15_defconfig
@@ -61,6 +61,7 @@
 CONFIG_ENV_UBI_VOLUME_REDUND="uboot_config_r"
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_SYS_MMC_ENV_DEV=-1
+CONFIG_TFTP_TSIZE=y
 CONFIG_STM32_ADC=y
 CONFIG_CLK_SCMI=y
 CONFIG_SET_DFU_ALT_INFO=y