Chitu V5 with extra GPIO init (#18299)

Co-authored-by: Scott Lahteine <github@thinkyhead.com>

platformio.ini

@@ -664,6 +664,15 @@ build_flags   = ${common_stm32f1.build_flags}
 build_unflags = ${common_stm32f1.build_unflags}
   -DCONFIG_MAPLE_MINI_NO_DISABLE_DEBUG= -DERROR_LED_PORT=GPIOE -DERROR_LED_PIN=6
 
+#
+# Some Chitu V5 boards have a problem with GPIO init.
+# Use this target if G28 or G29 are always failing.
+#
+[env:chitu_v5_gpio_init]
+platform      = ${common_stm32f1.platform}
+extends       = env:chitu_f103
+build_flags   = ${env:chitu_f103.build_flags} -DCHITU_V5_Z_MIN_BUGFIX
+
 #
 # STM32F401VE
 # 'STEVAL-3DP001V1' STM32F401VE board - https://www.st.com/en/evaluation-tools/steval-3dp001v1.html