aspeed/i2c: Clean up local variable shadowing

Remove superfluous local 'data' variable and use the one define at the
top of the routine. This fixes :

  ../hw/i2c/aspeed_i2c.c: In function ‘aspeed_i2c_bus_recv’:
  ../hw/i2c/aspeed_i2c.c:315:17: warning: declaration of ‘data’ shadows a previous local [-Wshadow=compatible-local]
    315 |         uint8_t data;
        |                 ^~~~
  ../hw/i2c/aspeed_i2c.c:288:13: note: shadowed declaration is here
    288 |     uint8_t data;
        |             ^~~~

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-ID: <20230922155924.1172019-2-clg@kaod.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Markus Armbruster <armbru@redhat.com>

hw/i2c/aspeed_i2c.c

@@ -312,7 +312,6 @@ static void aspeed_i2c_bus_recv(AspeedI2CBus *bus)
         SHARED_ARRAY_FIELD_DP32(bus->regs, reg_pool_ctrl, RX_COUNT, i & 0xff);
         SHARED_ARRAY_FIELD_DP32(bus->regs, reg_cmd, RX_BUFF_EN, 0);
     } else if (SHARED_ARRAY_FIELD_EX32(bus->regs, reg_cmd, RX_DMA_EN)) {
-        uint8_t data;
         /* In new mode, clear how many bytes we RXed */
         if (aspeed_i2c_is_new_mode(bus->controller)) {
             ARRAY_FIELD_DP32(bus->regs, I2CM_DMA_LEN_STS, RX_LEN, 0);