staging: sm750fb: prefix global identifiers

Renaming some symbols inside this driver caused a conflict with
an existing function, which in turn results in a link error:

drivers/staging/sm750fb/sm750fb.o: In function `enable_dma':
ddk750_hwi2c.c:(.text.enable_dma+0x0): multiple definition of `enable_dma'

This adds a sm750_ prefix to each global symbol in the sm750fb
driver that does not already have one. I manually looked for the
symbols and then converted the driver using

for i in calc_pll_value format_pll_reg set_power_mode set_current_gate    \
	enable_2d_engine enable_dma enable_gpio enable_i2c hw_set2dformat \
	hw_de_init hw_fillrect hw_copyarea hw_imageblit hw_cursor_enable  \
	hw_cursor_disable hw_cursor_setSize hw_cursor_setPos		  \
	hw_cursor_setColor hw_cursor_setData hw_cursor_setData2 ;
do
		sed -i "s:\<$i\>:sm750_$i:" drivers/staging/sm750fb/*.[ch]
done

Fixes: 03140dab ("staging: sm750fb: Replace functions CamelCase naming with underscores.")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>