tree: Consolidate BIT() macro

Change-Id: I7e61f7671b70ca5ed751d99405714436bcd18d5a
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/64962
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>

nicintel_spi.c

@@ -74,8 +74,6 @@
 // #define FL_BUSY	30
 // #define FL_ER	31
 
-#define BIT(x) (1<<(x))
-
 struct nicintel_spi_data {
 	uint8_t *spibar;
 };