Remove gd32vf103 flash driver.

Per mainline, use stm32f1x instead. Tested that this is working.

Change-Id: Icda4b2a39e06e2adf9bbfb984bd578347f43d7d1
Signed-off-by: Tim Newsome <tim@sifive.com>

src/flash/nor/Makefile.am

@@ -66,7 +66,6 @@ NOR_DRIVERS = \
 	%D%/stm32lx.c \
 	%D%/stm32l4x.c \
 	%D%/stm32h7x.c \
-	%D%/gd32vf103.c \
 	%D%/str7x.c \
 	%D%/str9x.c \
 	%D%/str9xpec.c \

src/flash/nor/drivers.c

@@ -44,7 +44,6 @@ extern const struct flash_driver faux_flash;
 extern const struct flash_driver fm3_flash;
 extern const struct flash_driver fm4_flash;
 extern const struct flash_driver fespi_flash;
-extern const struct flash_driver gd32vf103_flash;
 extern const struct flash_driver jtagspi_flash;
 extern const struct flash_driver kinetis_flash;
 extern const struct flash_driver kinetis_ke_flash;
@@ -153,7 +152,6 @@ static const struct flash_driver * const flash_drivers[] = {
 	&stm32lx_flash,
 	&stm32l4x_flash,
 	&stm32h7x_flash,
-	&gd32vf103_flash,
 	&stmsmi_flash,
 	&stmqspi_flash,
 	&str7x_flash,