rtl8723au_bt: Convert btusb_send_frame() to use an aligned buffer

Some platforms require dword alignment for the data buffer. This change uses
kmalloc to get a buffer, which will be 4-byte aligned on a 32-bit CPU,
and 8-byte aligned on a 64-bit CPU. The data is then copied to the new buffer.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
rtl8723au_bt: Remove DOS endings

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Merge branch 'new' of https://github.com/lwfinger/rtl8723au_bt into new

Conflicts:
	rtk_btusb.c