rv1106: spl: update version to v1.02

Build from:
f1d94e1902 configs: rv1106: Enable SPL_AB by default

Build command:
./make.sh rv1106 --spl-new --spl-fwver v1.02

Update features:
1. Support for

rv1106: spl: update version to v1.02

Build from:
f1d94e1902 configs: rv1106: Enable SPL_AB by default

Build command:
./make.sh rv1106 --spl-new --spl-fwver v1.02

Update features:
1. Support for A/B systems.
2. Print and pass the firmware version number.
3. Solve the issue that the backup image is not loaded when
the SPL load or check u-boot.dtb fails.

Signed-off-by: Xuhui Lin <xuhui.lin@rock-chips.com>
Change-Id: I5d266ce9ee8209893c0eb747ae039536e91613e8

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