Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1].

[1] 
https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <[email protected]>
---
 drivers/pinctrl/pinctrl-lpc18xx.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-lpc18xx.c 
b/drivers/pinctrl/pinctrl-lpc18xx.c
index e4677546aec4..7b2f885e68bd 100644
--- a/drivers/pinctrl/pinctrl-lpc18xx.c
+++ b/drivers/pinctrl/pinctrl-lpc18xx.c
@@ -838,11 +838,11 @@ static int lpc18xx_pconf_get_pin(struct pinctrl_dev 
*pctldev, unsigned param,
                *arg = (reg & LPC18XX_SCU_PIN_EHD_MASK) >> 
LPC18XX_SCU_PIN_EHD_POS;
                switch (*arg) {
                case 3: *arg += 5;
-                       /* fall through */
+                       fallthrough;
                case 2: *arg += 5;
-                       /* fall through */
+                       fallthrough;
                case 1: *arg += 3;
-                       /* fall through */
+                       fallthrough;
                case 0: *arg += 4;
                }
                break;
@@ -1057,11 +1057,11 @@ static int lpc18xx_pconf_set_pin(struct pinctrl_dev 
*pctldev, unsigned param,
 
                switch (param_val) {
                case 20: param_val -= 5;
-                        /* fall through */
+                       fallthrough;
                case 14: param_val -= 5;
-                        /* fall through */
+                       fallthrough;
                case  8: param_val -= 3;
-                        /* fall through */
+                       fallthrough;
                case  4: param_val -= 4;
                         break;
                default:
-- 
2.27.0

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