thermal: exynos: replace tmu_pmin check by Exynos5440 one

reg->tmu_pmin is set to non-zero value only for Exynos5440
so replace check for non-zero value of reg->tmu_pmin by
explicitly checking for Exynos5440 SoC type.  Then remove no
longer needed reg->tmu_pmin register abstraction.

There should be no functional changes caused by this patch.

Cc: Amit Daniel Kachhap <amit.daniel@samsung.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/thermal/samsung/exynos_tmu.c

@@ -271,8 +271,8 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
 		}
 	}
 	/*Clear the PMIN in the common TMU register*/
-	if (reg->tmu_pmin && !data->id)
-		writel(0, data->base_second + reg->tmu_pmin);
+	if (data->soc == SOC_ARCH_EXYNOS5440 && !data->id)
+		writel(0, data->base_second + EXYNOS5440_TMU_PMIN);
 out:
 	clk_disable(data->clk);
 	mutex_unlock(&data->lock);

drivers/thermal/samsung/exynos_tmu.h

@@ -92,7 +92,6 @@ enum soc_type {
  * @tmu_intstat: Register containing the interrupt status values.
  * @tmu_intclear: Register for clearing the raised interrupt status.
  * @emul_con: TMU emulation controller register.
- * @tmu_pmin: register to get/set the Pmin value.
  */
 struct exynos_tmu_registers {
 	u32	tmu_ctrl;
@@ -116,8 +115,6 @@ struct exynos_tmu_registers {
 	u32	tmu_intclear;
 
 	u32	emul_con;
-
-	u32	tmu_pmin;
 };
 
 /**

drivers/thermal/samsung/exynos_tmu_data.c

@@ -402,7 +402,6 @@ static const struct exynos_tmu_registers exynos5440_tmu_registers = {
 	.tmu_intstat = EXYNOS5440_TMU_S0_7_IRQ,
 	.tmu_intclear = EXYNOS5440_TMU_S0_7_IRQ,
 	.emul_con = EXYNOS5440_TMU_S0_7_DEBUG,
-	.tmu_pmin = EXYNOS5440_TMU_PMIN,
 };
 
 #define EXYNOS5440_TMU_DATA \