x86: use cpu_khz for loops_per_jiffy calculation, cleanup

As suggested by Ingo, remove all references to tsc from init/calibrate.c

TSC is x86 specific, and using tsc in variable names in a generic file should
be avoided. lpj_tsc is now called lpj_fine, since it is related to fine tuning
of lpj value. Also tsc_rate_*  is called timer_rate_*

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Daniel Hecht <dhecht@vmware.com>
Cc: Tim Mann <mann@vmware.com>
Cc: Zach Amsden <zach@vmware.com>
Cc: Sahil Rihan <srihan@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/delay.h b/include/linux/delay.h
index 01aec60..fd832c6 100644
--- a/include/linux/delay.h
+++ b/include/linux/delay.h
@@ -41,7 +41,7 @@
 #define ndelay(x) ndelay(x)
 #endif
 
-extern unsigned long lpj_tsc;
+extern unsigned long lpj_fine;
 void calibrate_delay(void);
 void msleep(unsigned int msecs);
 unsigned long msleep_interruptible(unsigned int msecs);