[PATCH v4] tty: serial: samsung_tty: support 18 uart ports

[Faraz Ata <faraz.ata@samsung.com>]

ExynosAutov920 SoC supports 18 UART ports, update
the value of UART_NR to accommodate the same.

Signed-off-by: Faraz Ata <faraz.ata@samsung.com>
---
Changes in v4:
- Updated v3 change-log as discussed with Greg[2]
- The patch itself remains unchanged, only the change logs have been updated.
- Link to v3: https://patchwork.kernel.org/project/linux-arm-kernel/patch/20250417043427.1205626-1-faraz.ata@samsung.com/
- Reference: [2] https://lore.kernel.org/linux-samsung-soc/2025042829-heroics-deskwork-e74d@gregkh/

Changes in v3:
- Added changes-log (as pointed by Krzysztof[1]
- Link to v2: https://patchwork.kernel.org/project/linux-samsung-soc/patch/20250404135006.1263827-1-faraz.ata@samsung.com/
- Reference: [1] https://lore.kernel.org/linux-samsung-soc/03cc01dbaaaa$4dea13f0$e9be3bd0$@samsung.com/

Changes in v2:
- Rebased on the latest linux-next and added reviewers as per get_maintainer.
- Link to v1: https://patchwork.kernel.org/project/linux-samsung-soc/patch/20250312061932.1797993-1-faraz.ata@samsung.com/

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 210fff7164c1..9a5211b730fb 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -52,7 +52,7 @@
 #define S3C24XX_SERIAL_MINOR	64
 
 #ifdef CONFIG_ARM64
-#define UART_NR			12
+#define UART_NR			18
 #else
 #define UART_NR			CONFIG_SERIAL_SAMSUNG_UARTS
 #endif
-- 
2.34.1