[XEN v1] xen/Arm: Remove the extra assignment

[Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>]

As "io_size" and "uart->io_size" are both u64, so there will be no truncation.
Thus, one can remove the ASSERT() and extra assignment.

In an earlier commit (7c1de0038895cbc75ebd0caffc5b0f3f03c5ad51),
"ns16550.io_size" was u32 and "io_size" was u64. Thus, the ASSERT() was needed
to check if the values are the same.
However, in a later commit (c9f8e0aee507bec25104ca5535fde38efae6c6bc),
"ns16550.io_size" was changed to u64. Thus, the ASSERT() became redundant.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
---
 xen/drivers/char/ns16550.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/xen/drivers/char/ns16550.c b/xen/drivers/char/ns16550.c
index 01a05c9aa8..58d0ccd889 100644
--- a/xen/drivers/char/ns16550.c
+++ b/xen/drivers/char/ns16550.c
@@ -1747,7 +1747,6 @@ static int __init ns16550_uart_dt_init(struct 
dt_device_node *dev,
     struct ns16550 *uart;
     int res;
     u32 reg_shift, reg_width;
-    u64 io_size;
 
     uart = &ns16550_com[0];
 
@@ -1758,14 +1757,10 @@ static int __init ns16550_uart_dt_init(struct 
dt_device_node *dev,
     uart->parity    = UART_PARITY_NONE;
     uart->stop_bits = 1;
 
-    res = dt_device_get_address(dev, 0, &uart->io_base, &io_size);
+    res = dt_device_get_address(dev, 0, &uart->io_base, &uart->io_size);
     if ( res )
         return res;
 
-    uart->io_size = io_size;
-
-    ASSERT(uart->io_size == io_size); /* Detect truncation */
-
     res = dt_property_read_u32(dev, "reg-shift", &reg_shift);
     if ( !res )
         uart->reg_shift = 0;
-- 
2.17.1