feat(longan): add uart7 & 5000mA bat

huangcm

2025-07-03 5fc6eec0444a62f7a596240b200dd837059dba70

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amitmahajan@google.com
jackyu@google.com
rgreenwalt@google.com
fionaxu@google.com
jminjie@google.com
mpq@google.com
shuoq@google.com
refuhoo@google.com