configs: rockchip: sync ENV_MEM_LAYOUT_SETTINGS for px30 to rk3308/etc

configs: rockchip: sync ENV_MEM_LAYOUT_SETTINGS for px30 to rk3308/etc

Loading a FIT image for kernel, initrd and rootfs on px30 can result in an
memory overlap, resulting in the not 100% helpful message of
"This will not be a case any time" from lmb_fix_over_lap_regions().

Adding a bit of debug info to lmb_fix_over_lap_regions() brings:
lmb_fix_over_lap_regions: base1 0x280000-0x6005ac > base2 0x600000-0x6000d1

So this is because the FIT image gets loaded to the kernel_addr_r at
0x280000 while the pxe-file is already living at 0x600000, only 3.5MB
behind.

In commit 4acc8bb044a4 ("configs: rockchip: sync ENV_MEM_LAYOUT_SETTINGS
for rk3308, rk3328, and rk3399") FUKAUMI Naoki already brought the memory
layouts for the mentioned socs in sync.

Adjusting the env-layout on px30 to this scheme, magically solves the
overlap issue and also brings px30 more in line with the other mentioned
SoCs.

Signed-off-by: Heiko Stuebner <heiko.stuebner@cherry.de>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>