fix file specification in comments

Many files include the filename at the beginning, serveral used a wrong one.

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

arch/alpha/kernel/alpha_ksyms.c

@@ -1,5 +1,5 @@
 /*
- * linux/arch/alpha/kernel/ksyms.c
+ * linux/arch/alpha/kernel/alpha_ksyms.c
  *
  * Export the alpha-specific functions that are needed for loadable
  * modules.

arch/alpha/kernel/head.S

@@ -1,5 +1,5 @@
 /*
- * alpha/boot/head.S
+ * arch/alpha/kernel/head.S
  *
  * initial boot stuff.. At this point, the bootloader has already
  * switched into OSF/1 PAL-code, and loaded us at the correct address

arch/alpha/kernel/machvec_impl.h

@@ -1,5 +1,5 @@
 /*
- *	linux/arch/alpha/kernel/machvec.h
+ *	linux/arch/alpha/kernel/machvec_impl.h
  *
  *	Copyright (C) 1997, 1998  Richard Henderson
  *