tty: amba-pl011: constify vendor_data structures

These vendor_data structures are only stored in the vendor field of
the uart_amba_port structure, as defined in the same file, and this
field is declared as const.  Thus the vendor_data structures can be
const too.

Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/amba-pl011.c

@@ -128,7 +128,7 @@ static struct vendor_data vendor_arm = {
 	.get_fifosize		= get_fifosize_arm,
 };
 
-static struct vendor_data vendor_sbsa = {
+static const struct vendor_data vendor_sbsa = {
 	.reg_offset		= pl011_std_offsets,
 	.fr_busy		= UART01x_FR_BUSY,
 	.fr_dsr			= UART01x_FR_DSR,
@@ -143,7 +143,7 @@ static struct vendor_data vendor_sbsa = {
 };
 
 #ifdef CONFIG_ACPI_SPCR_TABLE
-static struct vendor_data vendor_qdt_qdf2400_e44 = {
+static const struct vendor_data vendor_qdt_qdf2400_e44 = {
 	.reg_offset		= pl011_std_offsets,
 	.fr_busy		= UART011_FR_TXFE,
 	.fr_dsr			= UART01x_FR_DSR,