hardware_adc missing dependency on hardware_gpio

[ooxi]

When including hardware/adc.h while depending on hardware_adc_headers I'm getting a compile error because hardware/gpio.h cannot be found

In file included from /mysource.c++:4:
/pico-sdk/src/rp2_common/hardware_adc/include/hardware/adc.h:12:10: fatal error: hardware/gpio.h: No such file or directory
   12 | #include "hardware/gpio.h"
      |          ^~~~~~~~~~~~~~~~~
compilation terminated.

This is caused by neither hardware_adc nor hardware_adc_headers declaring a dependency on hardware_gpio / hardware_gpio_headers.

[kilograham]

all dependencies issues are moving to 1.5.0

[kilograham]

fixed by #1211

[kilograham]

merged into develop