ipmi_si: Load acpi_ipmi when ACPI IPMI interface added

Try to load acpi_ipmi when an ACPI IPMI interface is added, so that the
ACPI IPMI OpRegion is accessible.
Signed-off-by: Stuart Hayes <stuart.w.hayes@gmail.com>
Message-Id: <20200311192409.59923-1-stuart.w.hayes@gmail.com>
Signed-off-by: Corey Minyard <cminyard@mvista.com>

drivers/char/ipmi/ipmi_si_platform.c

@@ -393,6 +393,8 @@ static int acpi_ipmi_probe(struct platform_device *pdev)
 	dev_info(io.dev, "%pR regsize %d spacing %d irq %d\n",
 		 res, io.regsize, io.regspacing, io.irq);
 
+	request_module("acpi_ipmi");
+
 	return ipmi_si_add_smi(&io);
 
 err_free: