check enter_hyp_mode done. NOT COMPILE
revert commit 1a7a31fb839d8e59fc56c89f9b2d211a37ac0404. there is no need to add -nostdlib while using gcc gnueabihf 4.8
Revert "revert commit 1a7a31fb839d8e59fc56c89f9b2d211a37ac0404. there is no need to add -nostdlib while using gcc gnueabihf 4.8"

This reverts commit 7b0067c99e1cca9a9c025c71cfd190e1eacce063.
revert commit 1a7a31fb839d8e59fc56c89f9b2d211a37ac0404. there is no need to add -nostdlib while using gcc gnueabihf 4.8
enable early_uart_ready
using cortex_a15_init for cortex-a7
add sun6i support in enter_hyp_mode. add cortex-a7 heads
print CPSR after switch to hyp mode
fix wrong modify. enable uart ready in C code
add debug info
comment all the print added by me. comment smp_clear_cpu_maps in order to focus on device tree