bsp: k230: fix kconfig warnings

scons --menuconfig will report:
```
warning: the choice symbol PKG_USING_ZLIB_LATEST_VERSION
(defined at /home/u/.env/packages/packages/misc/zlib/Kconfig:31)
is selected by the following symbols, but select/imply has no
effect on choice symbols
 - BSP_ROOTFS_TYPE_CROMFS (defined at Kconfig:36)
warning: default on the choice symbol BSP_USING_SDIO0
(defined at board/Kconfig:20) will have no effect, as defaults
do not affect choice symbols
warning: default on the choice symbol BSP_USING_SDIO1
(defined at board/Kconfig:34) will have no effect, as defaults
do not affect choice symbols
```

Fix and remove these warnings.

Signed-off-by: Chen Wang <[email protected]>

Author: unicornx

bsp/k230/Kconfig

@@ -37,5 +37,4 @@ choice BSP_ROOTFS_TYPE
         bool "Use Compressed ROM File-System (ReadOnly)"
         select RT_USING_DFS_CROMFS
         select PKG_USING_ZLIB
-        select PKG_USING_ZLIB_LATEST_VERSION
 endchoice

bsp/k230/board/Kconfig

@@ -19,7 +19,6 @@ menu "Drivers Configuration"
 
                 config BSP_USING_SDIO0
                     bool "Enable SDIO0"
-                    default y
 
                     if BSP_USING_SDIO0
                         config BSP_SDIO0_EMMC
@@ -33,7 +32,6 @@ menu "Drivers Configuration"
 
                 config BSP_USING_SDIO1
                     bool "Enable SDIO1"
-                    default n
             endchoice
 
             config BSP_SD_MNT_DEVNAME