src/acpi to src/lib: Fix spelling errors

These issues were found and fixed by codespell, a useful tool for
finding spelling errors.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: I5b8ecdfe75d99028fee820a2034466a8ad1c5e63
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58080
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/drivers/generic/gpio_keys/chip.h

@@ -81,7 +81,7 @@ struct drivers_generic_gpio_keys_config {
 	struct acpi_gpio gpio;
 	/* Is this a polled GPIO button? - Optional */
 	bool is_polled;
-	/* Poll inverval - Mandatory only if GPIO is polled. */
+	/* Poll interval - Mandatory only if GPIO is polled. */
 	uint32_t poll_interval;
 	/* Details about the key - Mandatory */
 	struct key_info key;