scripts: dump-target-info print kernel versions

[aparcar]

This commits adds the ability to print Kernel versions of all
targets/subtargets. If a testing Kernel is set print that version as
well.

Example output:

apm821xx/nand 5.10
apm821xx/sata 5.10
arc770/generic 5.4
archs38/generic 5.4
armvirt/32 5.10
armvirt/64 5.10
at91/sam9x 5.10
at91/sama5 5.10
ath25/generic 5.4
ath79/generic 5.4 5.10
ath79/mikrotik 5.4 5.10
--- %< ---

This should help to get a quick update on the state of Kernels.

Signed-off-by: Paul Spooren mail@aparcar.org

@jow- since there are 100 ways to solve the same problem in Perl I'm sure you're aware of 99 ways to improve this. Please let me know.

[jow-]

LGTM

[aparcar]

Merged.

[ynezz]

@aparcar FYI it seems, like it probably doesn't handle subtargets properly, for example x86 and ipq40xx:

ipq40xx/chromium 5.10
ipq40xx/generic 5.10
ipq40xx/mikrotik 5.10
ipq806x/generic 5.10

x86/64 5.10
x86/generic 5.10
x86/geode 5.10
x86/legacy 5.10

as those targets have currently 5.15 available:

$ grep KERNEL_TESTING_PATCHVER target/linux/{ipq40xx,x86}/Makefile 
target/linux/ipq40xx/Makefile:KERNEL_TESTING_PATCHVER:=5.15
target/linux/x86/Makefile:KERNEL_TESTING_PATCHVER:=5.15