treewide: use full path to adc.h header
The build infrastructure should not be adding the drivers subdirectory
to the include path. Fix the legacy uses that depended on that
addition.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
diff --git a/drivers/adc/adc_shell.c b/drivers/adc/adc_shell.c
index 1431809..045e41d 100644
--- a/drivers/adc/adc_shell.c
+++ b/drivers/adc/adc_shell.c
@@ -6,7 +6,7 @@
#include <shell/shell.h>
#include <stdlib.h>
-#include <adc.h>
+#include <drivers/adc.h>
#include <ctype.h>
#include <sys/util.h>