clk: tegra: clk-tegra30: Remove unused variable 'reg'

Fixes the following W=1 kernel build warning(s):

drivers/clk/tegra/clk-tegra30.c: In function ‘tegra30_enable_cpu_clock’:
drivers/clk/tegra/clk-tegra30.c:1107:15: warning: variable ‘reg’ set but not used [-Wunused-but-set-variable]

Cc: Peter De Schrijver <[e-mail]>
Cc: Prashant Gaikwad <[e-mail]>
Cc: Michael Turquette <[e-mail]>
Cc: Stephen Boyd <[e-mail]>
Cc: Thierry Reding <[e-mail]>
Cc: Jonathan Hunter <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Lee Jones <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Stephen Boyd <[e-mail]>

drivers/clk/tegra/clk-tegra30.c

···
 
 static void tegra30_enable_cpu_clock(u32 cpu)
 {
-	unsigned int reg;
-
 	writel(CPU_CLOCK(cpu),
 	       clk_base + TEGRA30_CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR);
-	reg = readl(clk_base +
-		    TEGRA30_CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR);
+	readl(clk_base + TEGRA30_CLK_RST_CONTROLLER_CLK_CPU_CMPLX_CLR);
 }
 
 static void tegra30_disable_cpu_clock(u32 cpu)