help preparing kernel environment topic

Such foremost reason for this post is to ask for help and would like to compile my own kernel from my xperia M2 D2306 but I find a little inconvenience is only to find a file identification from my xperia I explain what this is.

This is the tutorial I'm following:
[ULTIMATE GUIDE] [Noob Friendly] Compile your own kernel from source android

As well I follow this tutorial sony:
How to rebuild kernels for flagship Xperia devices [tutorial]

And drop tools that tell me there is a problem but tell me this:

Code:

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Replace Device Name with the configuration file found at:
Source / arch / arm / configs
It's written in This Way something_DeviceCodename_user_defconfig

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and I went to the specified path but can not find any file of this type


information from the filename of the Xperia M2:

Code:

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Xperia M2
aosp_yukon_eagle_defconfig

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How could set the name of my device before entering the kernel configuration script

would be helpful thanks