tpm_tis: make ilb_base_addr static

The pointer ilb_base_addr does not need to be in global scope, so make
it static.

Cleans up sparse warning:
"symbol 'ilb_base_addr' was not declared. Should it be static?"

Signed-off-by: Colin Ian King <[e-mail]>
Reviewed-by: Jarkko Sakkinen <[e-mail]>
Signed-off-by: Jarkko Sakkinen <[e-mail]>
Signed-off-by: James Morris <[e-mail]>

drivers/char/tpm/tpm_tis.c

···
 #define LPC_CNTRL_REG_OFFSET            0x84
 #define LPC_CLKRUN_EN                   (1 << 2)
 
-void __iomem *ilb_base_addr;
+static void __iomem *ilb_base_addr;
 
 static inline bool is_bsw(void)
 {