configs/imxrt1050-evk: This commit adds support for booting from the on board...

configs/imxrt1050-evk:  This commit adds support for booting from the on board HYPER Flash. I placed the boot and flash files in the /configs/imxrt1050-evk/ , because I thing they are board related, so for other board or other flash this files has to be changed.  So far I verified that the __start function is called and the code is executing from flash, but still the rest of the code is not tested.