soc/intel/cpulib: Remove redundent enable/disable functions

This patch removes multiple enable/disable function definitions and
make use of single function with argument to know feature status
(enable/disable).

Change-Id: I502cd2497b07e9de062df453ecbb9c11df692f5a
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32282
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/icelake/cpu.c

@@ -73,10 +73,8 @@ static void configure_misc(void)
 	msr = rdmsr(IA32_MISC_ENABLE);
 	msr.lo |= (1 << 0);	/* Fast String enable */
 	msr.lo |= (1 << 3);	/* TM1/TM2/EMTTM enable */
-	if (conf->eist_enable)
-		cpu_enable_eist();
-	else
-		cpu_disable_eist();
+	/* Set EIST status */
+	cpu_set_eist(conf->eist_enable);
 	wrmsr(IA32_MISC_ENABLE, msr);
 
 	/* Disable Thermal interrupts */